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Sample search results for: zero-age main sequence

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1 Taurus-Auriga Supercluster?
 

Summary:  8 years old zero-age main sequence stars existence of superclusters confirmed by analysis... -Auriga association revealed a number of new pre- main sequence and zero-age main sequence stars (Wichmann et al. 1996... defined ...

  

Source: Reffert, Sabine - Landessternwarte Heidelberg-Königstuhl

 

Collection: Physics

 
2 Star 2000: Dynamics of Star Clusters and the Milky Way ASP Conference Series, Vol. 3 10 8 , 2000
 

Summary:  with an age of about 10 8 years as well as a few times 10 8 year-old zero-age main sequence stars. The reality... in and around the Taurus-Auriga association has revealed a number of new pre-main sequence and zero-age main... to the ...

  

Source: Reffert, Sabine - Landessternwarte Heidelberg-Königstuhl

 

Collection: Physics

 
3 Mon. Not. R. Astron. Soc. 281, 257--262 (1996) Printed 23 June 1997 (MN L a T E X style file v1.4) Zeroage mainsequence radii and luminosities as analytic
 

Summary:  .4) Zero­age main­sequence radii and luminosities as analytic functions of mass and metallicity Christopher... form 1995 October 30 ABSTRACT We present fitting formulae for the zero­age main­sequence radius... with the absolute zero­age mixture at 0.1 M fi , we `evolve' up the ...

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
4 AAS 196th Meeting, June 2000 Session 46. Binary and Variable Stars
 

Summary:  for the Sun at different stages in its life, from ZAMS (Zero Age Main Sequence) to the TAMS (Terminal Age Main... Sequence). The stars observed have spectral types of G0V to G5V and measured rotation periods. The ages

  

Source: Guedel, Manuel - Institut für Astronomie, Universität Wien

 

Collection: Physics

 
5 C h a p t e r 8 Construction and Analysis of HR Diagrams
 

Summary:  /radiative transition. The observational zero­age main sequence interpolated from Morton & Adams (1968) and Balona... observational and various theoretical zero­age main sequences, suggesting that further refinements in pre­main... are the ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
6 ASTRONOMY 4101 Problem Set #4
 

Summary:  calculations. 6. Describe the evolution of a 1 M star from zero-age main sequence until its final state. Please... ) Estimate the remaining main-sequence lifetime of this star, using the 0.71% of the mass-energy of hydrogen... of main- sequence stars. (a) Show that ...

  

Source: Basu, Shantanu - Department of Physics and Astronomy, University of Western Ontario

 

Collection: Physics

 
7 New pre-MS evolutionary tracks and planet formation Gunther Wuchterl
 

Summary:  zero age I will discuss the resulting star formation times, mean mass accretion-rates and median... evolution calculations is the early pre-main sequence phase. One important aim of star formation the- ory... and the pre-main sequence phase have therefore relied on ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
8 Supplementary Figure 1. The Arches cluster, as imaged in infrared light with the Hubble Space Telescope Near-Infrared Camera and Multi-object
 

Summary:  ;2 Supplementary Figure 2. Luminosity versus temperature for massive stars1 . Initial masses for the zero-age main... versus initial mass for massive stars at a variety of ages. The thin line corresponds to zero age, i... sequence (vertical dashes) are labeled. The horizontal lines mark ...

  

Source: Figer, Donald F. - Chester F. Carlson Center for Imaging Science, Rochester Institute of Technology

 

Collection: Physics

 
9 Stellar Structure and Evolution Theoretical Stellar Models
 

Summary:  tracks on H-R diagram. 9 and 25 MSun objects. #12;Evolution of a 1 Msun (Pop I) Star Zero-age main... s-1 is the energy source. ).()(4 2 rrr dr dL = #12;Energy Sources ( ) For pre-main-sequence stars... , from gravitational contraction. For main-sequence and giant stars, from nuclear reactions. For solar

  

Source: Basu, Shantanu - Department of Physics and Astronomy, University of Western Ontario

 

Collection: Physics

 
10 Convection, Protostellar Collapse, Deuterium Burning and PreMain Sequence Tracks
 

Summary:  contract to the (zero age) main­sequence where the en­ ergy radiated into space from the photospheres... Convection, Protostellar Collapse, Deuterium Burning and Pre­Main Sequence Tracks G. Wuchterl... Institut f¨ur Astronomie der Universit¨at Wien, A­1180 Wien Abstract. The ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
11 The University of Western Ontario Astronomy 511b
 

Summary:  much this change has displaced high-mass stars on the main sequence. Take #23; = 4 and #21; = 1 (for... the homology relations to estimate the change in T e and L (for given mass M) that have occurred for zero-age... main sequence stars over cosmic time as a result of the changing mean ...

  

Source: Landstreet, John D. - Department of Physics and Astronomy, University of Western Ontario

 

Collection: Physics

 
12 Astronomy & Astrophysics manuscript no. (will be inserted by hand later)
 

Summary:  Protostellar collapse and the evolution to the pre­main sequence. I: Equations and evolution in the Hertzsprung... parts of the flow and different parts of the evolution or they do not reach the pre­main sequence phase... . We calculate the pre­main sequence ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
13 Rapid Binary Star Evolution from Clusters to Galactic Christopher A. Tout, Jarrod R. Hurley
 

Summary:  :1 to 100 M#12; from the zero-age main sequence to the end of the stars life as a cooling degenerate remnant... the zero-age main sequence to carbon ignition, without mass loss or detailed modelling of thermal pulses... to generate the formulae, us- ing the ...

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
14 A&A manuscript no. (will be inserted by hand later)
 

Summary:  to the present position. We then compare the zero­age­main sequence models of low mass stars obtained... are fully convective, to the zero­age main sequence, evolutions of 0.9 ,0.8 ,0.7 ,0.6 and 0.5 M fi stars... collapse and were evolved up to zero ...

  

Source: Middle East Technical University, Department of Physics, Astrophysics Group

 

Collection: Physics

 
15 A Massive Star Odyssey, from Main Sequence to Supernova Proceedings IAU Symposium No. 212, c
 

Summary:  , as they are arriving on the zero age main sequence. 1. General remarks The discovery of the very young and compact H II... -called Vz luminosity class, as they are arriving on the zero age main sequence. Despite of the ...

  

Source: Charmandaris, Vassilis - Department of Physics, University of Crete

 

Collection: Physics

 
16 M.R. Burleigh 2601/Unit 5 DEPARTMENT OF PHYSICS AND ASTRONOMY
 

Summary:  .R. Burleigh 2601/Unit 5 The Main Sequence § Start of nuclear burning zero-age main sequence § As H He... Evolution #12;M.R. Burleigh 2601/Unit 5 Stellar Evolution § Star formation § Main sequence § Stellar... § Supernovae § Neutron Stars ...

  

Source: Burleigh, Matt - Department of Physics and Astronomy, University of Leicester

 

Collection: Physics

 
17 Astron. Astrophys. 325, 523528 (1997) ASTROPHYSICS
 

Summary:  , and [Fe/H], from evolutionary models of stars at the zero-age main sequence. We apply these resultstothe... at the zero-age main sequence (ZAMS), using the metallicity dependent mass- luminosity and mass... in the solar position from the ...

  

Source: Maciel, Walter Junqueira - Department of Astronomy, Institute of Astronomy and Geophysics, Universidade de São Paulo

 

Collection: Physics

 
18 ON THE STELLAR POPULATION OF THE ORION NEBULA CLUSTER
 

Summary:  and the zero­age main sequence over the range O5­M7. The 0.1, 1, and 10Myr isochrones are from the calculations... nonmembers. Superposed are the zero­age main sequence and the pre­main sequence evolutionary tracks of D... ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
19 25 MAIN SEQUENCE AND POST-MS EVOLUTION When the full pp and/or CNO reactions turn on, contraction ceases and the star becomes a stable
 

Summary:  scale factor) Zero-Age Main Sequence (ZAMS) to Red Giant Branch (RGB) For a given chemical composition... 25 MAIN SEQUENCE AND POST-MS EVOLUTION 0.6M¤ M15 M¤ When the full pp and/or CNO reactions turn on... * ! " # $ % & 2.5 years The main ...

  

Source: Sitko, Michael L. - Department of Physics, University of Cincinnati

 

Collection: Physics

 
20 SF2A 2002-Paris, June 24 -June 29 Societe Francaise d'Astronomie et d'Astrophysique (eds)
 

Summary:  class of massive stars, the so-called Vz lumi- nosity class, as they are arriving on the zero age main... age main sequence. Despite the recent progress, several questions on the nature of HEBs remain open... sequence. 1 Discussion Our recent HST ...

  

Source: Charmandaris, Vassilis - Department of Physics, University of Crete

 

Collection: Physics


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21 Astronomy & Astrophysics manuscript no. (will be inserted by hand later)
 

Summary:  the photospheres is balanced by nuclear energy generation. Then the stars are at the (zero age) main­ sequence... Protostellar collapse and the evolution to the pre­main sequence. I: Equations and evolution in the Hertzsprung... parts of the flow and different ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
22 From Darkness to Light ASP Conference Series, Vol. 3 \Theta 10 8
 

Summary:  before the zero age main sequence is reached. 2. Stellar evolution calculations before the main sequence... The calculation of stellar models after the zero age main sequence (ZAMS) is ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
23 Swarthmore Astronomy A Systematic Survey for Nearby Young Stars
 

Summary:  ) of G5 or later. · Luminosity a factor of at least 1.5 above the zero-age main sequence in the HR... and their disks evolve between the ages of nearby star-forming regions and the time they reach the zero-age main... like a nearby sample of these older ...

  

Source: Jensen, Eric L. N. - Department of Physics and Astronomy, Swarthmore College

 

Collection: Physics

 
24 Spectrophotometric Evolution The spectrophotometric evolution of a galaxy can be modeled given two kinds of information
 

Summary:  based on isochrone synthesis (Charlot & Bruzual 1991) begin by populating the zero­age main sequence... properties of main­ sequence and post­main­sequence stars. For example, suppose that for each star i ever... to models of early­type galaxies. Key stages ...

  

Source: Barnes, Joshua Edward - Institute for Astronomy, University of Hawai'i at Manoa

 

Collection: Physics

 
25 A&A manuscript no. (will be inserted by hand later)
 

Summary:  are at the (zero age) main­sequence and in the so­called `complete' (mechanical and thermal) equilibrium. nated... parts of the flow and different parts of the evolution or they do not reach the pre­main sequence phase... . We calculate the pre­main ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
26 PRE-MAIN SEQUENCE DWARFS NEAR VELORUM. K.W. Smith 1;2 , M.Gudel 1 , M. Audard 1 , and R.D. Je ries 3
 

Summary:  through a disc accretion phase as they contract towards the zero-age main sequence. Material accretes... 1 PRE-MAIN SEQUENCE DWARFS NEAR VELORUM. K.W. Smith 1;2 , M.Gudel 1 , M. Audard 1 , and R.D. Je... activity. Key words: Stars: active - stars: T Tauri 1. Introduction Low mass ...

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève; Guedel, Manuel - Institut für Astronomie, Universität Wien

 

Collection: Physics

 
27 Sterrenstelsels en Kosmos Assignment 1 --Solutions
 

Summary:  the evolution of the stars but not on the zero-age main sequence.) (a) For hot--that is, high... between stellar mass and luminosity for stars on the main sequence. Below you will use this relation... . Observationally, L M3.8 , so L M4 is a reasonable approximation for the ...

  

Source: Weijgaert, Rien van de - Kapteyn Astronomical Institute, Rijksuniversiteit Groningen

 

Collection: Physics

 
28 Star Formation in the Orion Nebula Francesco Palla 1 and Steven W. Stahler 2
 

Summary:  along a zero­age main sequence which is in excellent agreement with the empirical one. As a further aid... and zero­age main sequence in the HR diagram. All those more massive than about 8 M fi lie close... spanned a broad area above the ...

  

Source: Arcetri Astrophysical Observatory - Star-Formation Group Publications

 

Collection: Physics

 
29 1000 Lynne A. Hillenbrand The Ages of Stars
 

Summary:  , as well as to the zero-age and young main sequence phases. However, many of them are significantly... and zero-age main sequence ­ ages: (1) the theoretical HR diagram or extinction-correction color... . For example, all Taurus scattered light sources sit on or ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
30 Monash University School of Mathematical Sciences Stars Lab 4: Stellar Evolution with WTTS
 

Summary:  to start from a Zero-Age Main Sequence (ZAMS) model of a star similar to Sun. It is thought the Sun formed... are going to move from a 1 M model to a complete Zero Age Main Sequence model set. This is a set of models... diagram of the ...

  

Source: Izzard, Rob - Argelander Institute for Astronomy, Universität Bonn

 

Collection: Physics

 
31 PHYS 390 Lecture 16 -Stellar lifetimes 16 -1 2001 by David Boal, Simon Fraser University. All rights reserved; further resale or copying is strictly prohibited.
 

Summary:  to the Sun, log T log L zero-age log T log L intermediate age log T log L advanced age #12;PHYS 390... it is on the main sequence. Then the energy released in this time is red giants 107 to 108 years in the solar mass... range white dwarf main sequence contraction 106 years nuclear ...

  

Source: Boal, David - Department of Physics, Simon Fraser University

 

Collection: Physics

 
32 HIGHENERGY PROCESSES YOUNG STARS: CHANDRA XRAY SPECTROSCOPY HDE 283572, TAU, AND LkCa
 

Summary:  evolution between accretion phase zero­age main sequence. stage, decouples from accretion disk, spins up... (CTTS) disk­free phase a zero­age main sequence (ZAMS) While X­ray properties of protostars and CTTS... surrounding) CTTS. comparison of X­ray spectra ...

  

Source: Guedel, Manuel - Institut für Astronomie, Universität Wien

 

Collection: Physics

 
33 Mon. Not. R. Astron. Soc. 000, 1{7 (0000) Printed 5 February 1999 (MN L A T E X style le v1.4) Nonadiabatic linear pulsation models for low-mass helium
 

Summary:  of non-radial pulsations; zero-age helium-main sequence stars with 0:4 #21; M=M#12; #21; 0... have not found any overstable non-radial modes in our zero-age helium-main sequence models, while we... in the instability region on the HR diagram obtained in the previous ...

  

Source: Armagh Observatory

 

Collection: Physics

 
34 THE FIRST MILLION YEARS OF THE SUN: A CALCULATION OF FORMATION AND EARLY EVOLUTION OF A SOLARMASS STAR
 

Summary:  losses due to radiation from the stellar photosphere, i.e. the zero age main sequence (ZAMS... -- hydrodynamics -- stars: evolution -- stars: formation -- stars: pre­main sequence -- Sun: evolution 1... , and the central image shows the system when the young ...

  

Source: Wuchterl, Günther - Karl-Schwarzschild-Observatorium, Thüringer Landessternwarte Tautenburg

 

Collection: Physics

 
35 Selection from the Lithium (Age) Spectra of some Pic Moving Group members
 

Summary:  the gap between T Tauri (or Fe/Ge pre-main sequence) and zero-age mainsequence phases. This period... observed with the same configuration. Observations Post T Tauri stars (PTTS) and young main sequence stars... -ray detected pre-main sequence ...

  

Source: Gutiérrez, David Montes - Facultad de Ciencias Físicas, Universidad Complutense de Madrid

 

Collection: Physics

 
36 1 Introduction 3 2 Xray Binaries 5
 

Summary:  single stars ranging from 1.4M# to 3.5M# . The tracks start at the zero age main sequence... .4 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 5 Reconstructing evolved Main­Sequence... . These companions are, of low mass, and hence main ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
37 THE CENTRE OF THE LMC BAR A. ARDEBERG, P. LINDE AND R. SNEL
 

Summary:  ) of the galactic zero age main sequence (ZAMS). For open cluster data (Taff, #12; 2 A. ARDEBERG ET AL. Figure 1

  

Source: Lund Observatory

 

Collection: Physics

 
38 Astron. Nachr./AN 32X (200X) X, XXX--XXX The HELLAS2XMM survey: properties of the stellar population
 

Summary:  the Zero Age Main Sequence and the so­ lar age, and, since also the scale height is a function of age, we

  

Source: Micela, Giusi - Osservatorio Astronomico Di Palermo Giuseppe S. Vaiana; Osservatorio Astronomico Di Palermo, Giuseppe S. Vaiana

 

Collection: Physics

 
39 PHYS 390 Lecture 15 -Stars 15 -1 2001 by David Boal, Simon Fraser University. All rights reserved; further resale or copying is strictly prohibited.
 

Summary:  R's, slope = -4 log T log L zero-age main sequence slope = -5 constant R slope = -4 #12;

  

Source: Boal, David - Department of Physics, Simon Fraser University

 

Collection: Physics

 
40 Post T Tauri stars in the solar neighborhood: isolated or members of young associations and
 

Summary:  between 10 and 100 Myr filling the gap between T Tauri (TTS) and zero-age main sequence phases... -ray detected pre-main sequence stars in some star-forming regions. More recently, additional PTTS have been... ) as well as color-magnitude diagrams and pre-main ...

  

Source: Gutiérrez, David Montes - Facultad de Ciencias Físicas, Universidad Complutense de Madrid

 

Collection: Physics


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41 November 22, 2011 Lab 6 My Results
 

Summary:  Distance · Slide a theoretical "zero-age" main sequence isochrone vertically until it matches the cluster... in the Galactic disk (mostly). Background red giants or foreground dim red main- sequence stars. Still a few M34... main sequence. ­m - ...

  

Source: Glashausser, Charles - Department of Physics and Astronomy, Rutgers University

 

Collection: Physics

 
42 6.1 THE STRUCTURE OF MAIN-SEQUENCE STARS (ZG: 16.2; CO 10.6, 13.1)
 

Summary:  core burning phase zero-age main sequence (ZAMS): homogeneous composition Scaling relations for main-sequence... 6.1 THE STRUCTURE OF MAIN-SEQUENCE STARS (ZG: 16.2; CO 10.6, 13.1) · main-sequence phase: hydrogen... ) · near a solar mass: L L M M 4 · ...

  

Source: Bureau, Martin - Department of Physics, University of Oxford

 

Collection: Physics

 
43 THE EVOLUTIONARY STATUS OF HIGHLITHIUM, HIGHACTIVITY COOL DWARFS
 

Summary:  . On the other hand, if they are close to the Zero­Age Main Sequence (ZAMS), and thus with ages of tens... still in the pre­ main sequence phase, the complex picture presented by the available data on lithium... at different masses (indicated by the label on the ...

  

Source: Osservatorio Astronomico Di Palermo, Giuseppe S. Vaiana

 

Collection: Physics

 
44 Astronomy & Astrophysics manuscript no. paper February 5, 2006 (DOI: will be inserted by hand later)
 

Summary:  range 1...3 M , including the physics of rotation, from the zero age main sequence into the TP-AGB stage... calculated the evolution of stars starting a the zero-age main sequence for initial masses of 1.0 M , 1.5 M... . We calculate two sets of ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
45 Selection from the Lithium (Age) Spectra of some Pic Moving Group members
 

Summary:  the gap between T Tauri and zero-age main-sequence phases. This period of evolution remains ambiguous... . In the last years some PTTS have been identified among the X-ray detected pre-main sequence stars in some star... and kinematics) as well as color-magnitude diagrams and pre-main ...

  

Source: Gutiérrez, David Montes - Facultad de Ciencias Físicas, Universidad Complutense de Madrid

 

Collection: Physics

 
46 Selection from the lithium (Age) Spectra of some Pic Moving Group members
 

Summary:  -type stars in the age range between 10 and 100 Myrs filling the gap between T Tauri and zero-age main-sequence... among the X-ray detected pre main-sequence stars in some star-forming regions. More recently, additional... as color-magnitude diagrams and pre-main sequence isochrones. The ...

  

Source: Gutiérrez, David Montes - Facultad de Ciencias Físicas, Universidad Complutense de Madrid

 

Collection: Physics

 
47 24c STAR FORMATION III Protostellar Evolution toward the Main Sequence VERY SIMPLISTIC VERSION!
 

Summary:  , and the star settles down to become a "zero-age" main sequence (ZAMS) star. #12;5 #12;6 #12;7 For stars with M... 1 24c STAR FORMATION III Protostellar Evolution toward the Main Sequence ­ VERY SIMPLISTIC VERSION... (higher L and lower T) of the main ...

  

Source: Sitko, Michael L. - Department of Physics, University of Cincinnati

 

Collection: Physics

 
48 ASTROPHYSICAL JOURNAL, : 9901012, 2001
 

Summary:  +ers very little corre­ sponding model started zero­age main sequence. ratio heavy elements hydrogen (Z... sequence current epoch more details). product varies L (t)~2.5 ^4% entire period zero­age main sequence... relation satisÐed to ^0.5%. ...

  

Source: Bahcall, John - Institute for Advanced Study, Princeton University

 

Collection: Physics

 
49 November 17, 2011 Lab 6 Data Analysis
 

Summary:  "zero-age" main sequence isochrone vertically until matches the cluster main sequence. ­m - M = 5 log... (d/10 pc) #12;Cluster Age · Match the main-sequence turnoff. -11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4

  

Source: Glashausser, Charles - Department of Physics and Astronomy, Rutgers University

 

Collection: Physics

 
50 Identification of isolated post T Tauri stars in the solar neighborhood
 

Summary:  between 10 and 100 Myr filling the gap between T Tauri (TTS) and zero-age main sequence phases... -ray detected pre-main sequence stars in some star-forming regions. More recently, additional PTTS have been... ) as well as color-magnitude diagrams and pre- main ...

  

Source: Gutiérrez, David Montes - Facultad de Ciencias Físicas, Universidad Complutense de Madrid

 

Collection: Physics

 
51 Rotational evolution of intermediate mass stars with OPAL opacities: mass of the
 

Summary:  in different mass intervals between 0.8 ­ 120 M fi . These studies covered the evolution from the zero age main... : 08.05.3 Stars: evolution ­ 08.16.5 Stars:Pre­main sequence 08.18.1 Stars: rotation ­ Stars... that the revised stellar models of intermediate to high mass showed an ...

  

Source: Middle East Technical University, Department of Physics, Astrophysics Group

 

Collection: Physics

 
52 ASTROBIOLOGY Volume 3, Number 1, 2003
 

Summary:  fractions from the Graphite Peak section. The noble gases in this magnetic fraction were similar to zero-age... and an isolated magnetic fraction from the bulk material are consistent with solar-type gases measured in zero-age... differed somewhat from the zero-age IDP grains provided by Don Brownlee (University of Washington, ...

  

Source: Becker, Luann - Institute for Crustal Studies, University of California at Santa Barbara

 

Collection: Geosciences

 
53 C h a p t e r 7 A First Look at Stellar Populations: CM
 

Summary:  symbols. Photometric errors are shown. Superposed are the zero­age main sequence and the lines of constant... . Superposed are lines indicating pre­main sequence isochrones; we refer to Figure 3.2 for symbols indicating... (log) age derived by transforming the theoretical ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
54 THE ASTROPHYSICAL JOURNAL, 487:290303, 1997 September 20 1997. The American Astronomical Society. All rights reserved. Printed in U.S.A.(
 

Summary:  IN THE H-R DIAGRAM Zero-Age Terminal-Age Case Main Sequence Main Sequence Giant Branch A collision... . The equivalent of the zero-age main sequence is at posi- tion 1, and the turno, or terminal-age main ...

  

Source: Rasio, Frederic A. - Department of Physics and Astronomy, Northwestern University

 

Collection: Physics

 
55 Stellar evolution with a variable mixinglength parameter Regner Trampedach and Robert F. Stein
 

Summary:  on the zero­ age main sequence (ZAMS), illustrated in Fig. 1a. The results indicate that the line blanketing... during the main sequence life of stars lighter than the Sun, and decreasing T eff during turn... . Conclusion We have investigated how the ...

  

Source: Stein, Robert - Department of Physics and Astronomy, Michigan State University; Trampedach, Regner - Mt. Stromlo Observatory & Research School of Astronomy and Astrophysics, Australian National University

 

Collection: Physics

 
56 KINEMATICS OF NEARBY SUBDWARFS B. FUCHS, H. JAHREISS, R. WIELEN
 

Summary:  defined by the zero age #12; 2 B. FUCHS, H. JAHREISS, R. WIELEN main sequence of stars with solar... . Hipparcos parallaxes were used to determine the absolute magnitudes. The full lines indicate the main... sequence and the CMDs of the old clusters M 67 and NGC 188, ...

  

Source: Heidelberg, University of - Astronomisches Rechen-Institut (ARI)

 

Collection: Physics

 
57 IDENTIFICATION OF NEW CANDIDATE HERBIG Ae/Be STARS IN EXTREMELY YOUNG GALACTIC CLUSTERS
 

Summary:  85726 ABSTRACT The youngest known optically visible pre­main sequence stars are the Herbig Ae/Be stars... . These objects appear to represent a phase in the pre­main sequence lifetime of intermediate mass stars during... have just reached the main sequence. Recent ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
58 Stellar Magnetism C. Neiner and J.-P. Zahn (eds)
 

Summary:  that the Skumanich relation- ship holds only on an average sense (Soderblom 1983). On the zero-age main sequence... sequence evolution dictates the rotational history of young suns, up to their arrival on the zero-age main... braking by magnetized winds on the ...

  

Source: Ecole Polytechnique, Centre de mathématiques

 

Collection: Mathematics

 
59 Mon. Not. R. Astron. Soc. 316, 165172 (2000) Seismic study of stellar convective regions: the base of the convective
 

Summary:  panel) zero-age main- sequence stellar models. The lines represent the fitted expression (equation 8... ; in the overshoot region it is assumed that 7 7aX We first consider several models on the zero-age main sequence... in main-sequence stars ...

  

Source: Monteiro, Mário João - Centre for Astrophysics, University of Porto

 

Collection: Physics

 
60 Introduction and summary 1.1 The evolution of single stars
 

Summary:  centre allow hydrogen fusion to take place. The condensation has become a zero-age main-sequence star... . The labelled points are A: zero-age main sequence, B: terminal-age main sequence, C: base of the giant branch... that consists of a neutron ...

  

Source: van der Sluys, Marc - Department of Physics and Astronomy, Northwestern University

 

Collection: Physics


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61 On the Formation of Massive Primordial Stars Kazuyuki Omukai 1;2 and Francesco Palla 1
 

Summary:  present­day protostars and primordial zero­age main sequence stars. After an ini­ tial expansion... , a value which is still higher than that of a zero­age main sequence star (2:8 R fi for a 50 M fi star... . Subject headings: cosmology: theory --- early universe ...

  

Source: Arcetri Astrophysical Observatory - Star-Formation Group Publications

 

Collection: Physics

 
62 The Enigmatic F0V Star 47 Cas Paul ScherrerInstitut, CH5232 Villigen PSI, Switzerland
 

Summary:  Group, and may thus be a very young star near the Zero­Age Main Sequence. Quiescent luminosities are 1... ­rays (distance = 38 pc), making this star one of the most luminous quiescent coronal sources on the main sequence

  

Source: Benz, Arnold - Institut für Astronomie, Eidgenössische Technische Hochschule Zürich (ETHZ); Guedel, Manuel - Institut für Astronomie, Universität Wien

 

Collection: Physics

 
63 MAD Science Demonstration Proposal A new spin to constrain the absolute age of Metal Rich Globular Clusters
 

Summary:  their distances cannot be estimated using either RR Lyrae stars or Zero-Age Horizontal-Branch models. Based on NIR... showed that the hook of the lower main sequence, caused by the H2 opacity, can be used to estimate... an accurate Luminosity Function of the lower Main Sequence (see ...

  

Source: Liske, Jochen - European Southern Observatory

 

Collection: Physics

 
64 Albert E. Giorgi Don Chapman Consultants, Inc.. 7981 J68th Ave. NE
 

Summary:  -type chinook salmon migrate seaward and enter seawater as subyearlings or zero-age juveniles within a year... tributary, the Snake River, during the spring months (Raymond, 1979). In con- trast, zero-age ocean... River is limited. Early research showed that even during high-flow years, large numbers of zero-age

  

Source: National Oceanic and Atmospheric Administration (NOAA), Fishery Bulletin

 

Collection: Environmental Sciences and Ecology

 
65 A p p e n d i x C Ongoing Analysis in the Orion Nebula
 

Summary:  the ``birthline'' to the 2 or 3 Myr isochrone; 2) the high­mass stars are on or near the zero­age main sequence... . As discussed in the main text, there is some uneasiness about the literal interpretation of pre­main sequence... HR diagram presented in Chapter 8 ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
66 Astrophys Space Sci (2008) 316: 173178 DOI 10.1007/s10509-008-9786-7
 

Summary:  = 1.8 Stellar mass 0.8 M/M 8.0 summary). The zero age main sequence (ZAMS) and the terminal age main... the Code d'Évolution Stellaire Adaptatif et Modulaire (CESAM). The evolutionary sequences span from the pre-main... of ...

  

Source: Monteiro, Mário João - Centre for Astrophysics, University of Porto

 

Collection: Physics

 
67 THE EFFECT OF THE ELECTRON DONOR H+ 3 ON THE PREMAIN-SEQUENCE AND MAIN-SEQUENCE
 

Summary:  convective interior at zero-age main sequence, whereas the 0.4 M model star that accounts for Hþ 3 starts... zero-age main sequence with a radiative interior. Convective mixing in a fully convective star makes... method. All the stars of mass less than 0.4 M have a ...

  

Source: Harris, Gregory J. - Department of Physics and Astronomy, University College London

 

Collection: Physics

 
68 EVOLUTIONARY MODELS OF ROTATING LOW MASS STARS
 

Summary:  with and without magnetic fields. Calculations are pursued from zero-age main sequence through at least four... stars1 start out as very rapid rotators. They have zero-age main sequence surface velocities up... a the zero-age ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
69 Young Stars Near Earth: Progress and Prospects ASP Conference Series, Vol. 244, 2001
 

Summary:  the zero-age main sequence or ZAMS (e.g., Siess, Dufour, & Forestini 2000). If we use age as the de#12;ning... the observational challenges of #12;nding post T Tauri stars (PTTS), de#12;ned here as low-mass, pre{main-sequence... -forming regions and the main ...

  

Source: Jensen, Eric L. N. - Department of Physics and Astronomy, Swarthmore College

 

Collection: Physics

 
70 Young Stars Near Earth: Progress and Prospects ASP Conference Series, Vol. 244, 2001
 

Summary:  the upper bound is roughly the age at which solar-mass stars reach the zero-age main sequence or ZAMS (e... the observational challenges of finding post T Tauri stars (PTTS), defined here as low-mass, pre­main-sequence stars... . In this contribution, I discuss the difficulties inherent in trying to identify ...

  

Source: Jensen, Eric L. N. - Department of Physics and Astronomy, Swarthmore College

 

Collection: Physics

 
71 HIGH-ENERGY PROCESSES IN YOUNG STARS: CHANDRA X-RAY SPECTROSCOPY OF HDE 283572, RY TAU, AND LkCa 21
 

Summary:  evolution between the accretion phase and the zero-age main sequence. At this stage, the star decouples from... of a zero-age main sequence (ZAMS) star. While the X-ray properties of protostars and CTTS may be related... -ray spectra of classical T Tau stars, other ...

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève

 

Collection: Physics

 
72 THORIUM AND URANIUM CHRONOMETERS APPLIED TO CS 31082-001 Hendrik Schatz,1,2
 

Summary:  . In the case of CS 31082-001, we find it likely that the zero-age U and Th abundances were enhanced by about... the classical r-process model and (2) the zero-age abundances of Th and U in other r-process­enhanced, metal... for the first time a possible variation in the zero- age (the time of the r-process ...

  

Source: Cowan, John - Department of Physics and Astronomy, University of Oklahoma

 

Collection: Physics

 
73 1. Introduction and description of the model Rotation affects the stellar subphotospheric convection in many ways.
 

Summary:  of the W UMa type, many late type dwarfs lying close to the zero age main sequence show an ultra rapid... and its main components, i.e. radiative, convective, and kinetic, within all three layers, is similar... main components at different levels of the computational ...

  

Source: Stêpieñ, Kazimierz - Astronomical Observatory, Warsaw University

 

Collection: Physics

 
74 An efficient evolution algorithm for population synthesis of AGB stars
 

Summary:  the evolution of stars in a wide range of mass and metallicity from the zero­age main sequence to the tip... k=1 c ki [log(Z=0:02)] k\Gamma1 : Tout et al. (1996) already gave similar formulae for the zero­age... main sequence (ZAMS). The accuracy of the formulae is ...

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
75 Introduction and summary 1.1 Close binary stars and evolution
 

Summary:  a similar origin: they must have started as two ordinary main­sequence stars. A single star expands during... its evolution: from a relatively small main­sequence star it becomes a giant, or even a supergiant... fuel is therefore mixed into the centre and the main­sequence lifetime of the star is extended

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
76 C. Charbonnel, F. Combes and R. Samadi (eds) THE TIMESCALE FOR GIANT PLANET FORMATION : CONSTRAINTS FROM THE
 

Summary:  towards the zero-age main sequence (ZAMS). Depending on the initial velocity and disk lifetime, a wide... ) or line emission (gas) in pre-main sequence stars, appear to vary from star to star, in the range from 1... the pre-main sequence. In this ...

  

Source: Ecole Polytechnique, Centre de mathématiques

 

Collection: Mathematics

 
77 Stellar Convection Over a Rapidly Rotating Core K. Stepie'n 1 , M. Kiraga 1 , K. Jahn 1 ,
 

Summary:  age main sequence show an ultra rapid rotation with periods close to 0.2 of a day (Soderblom et al... ; Beside short­period contact binaries of the W UMa type, many late type dwarfs located closely to the zero... and its main components, i.e. the radiative, convective, and kinetic fluxes ...

  

Source: Jahn, Krzysztof - Warsaw University Astronomical Observatory

 

Collection: Physics

 
78 The youngest massive star clusters in the Magellanic Clouds M. Heydari-Malayeri1, V. Charmandaris2, L. Deharveng3, M.R. Rosa4,
 

Summary:  age main sequence. 3 Perspectives Despite of the recent progress, several questions on the nature... ]). Figure 2: HST/STIS UV spectrum of the main exciting star in N81 (see [8]). To examine in more detail... class of massive stars, the so-called Vz luminosity class (i.e. [10]), as they are arriving on the ...

  

Source: Charmandaris, Vassilis - Department of Physics, University of Crete

 

Collection: Physics

 
79 THE ASTROPHYSICAL JOURNAL, 555:9901012, 2001 July 10 V ( 2001. The American Astronomical Society. All rights reserved. Printed in U.S.A.
 

Summary:  - sponding model started at the zero-age main sequence. The ratio of heavy elements to hydrogen (Z... by an arrow. The radius increases from 0.87 at the zero-age main sequence to 1.0 at theR _ R _ present epoch... .5 ^4% over the entire period from the ...

  

Source: Bahcall, John - Institute for Advanced Study, Princeton University

 

Collection: Physics

 
80 MonteCarlo simulations of binary stellar evolution in young open clusters
 

Summary:  . 10 in Mermilliod 1981a). The solid line is the zero­age main sequence. Blue stragglers are indicated... ­star, white­ dwarf, neutron­star, and stripped main­sequence­star companions; the fifth type are single... , merged main­sequence stars. We derive the expected numbers and ...

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics


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81 The Young Stellar Populations in the Solar Neighbourhood
 

Summary:  of normal late-type stars [12, 13, 9, 7]. This decrease mostly occurs between the Zero Age Main Sequence... and the solar age, while it is nearly negligible during the pre-main sequence phase. As a consequence, X... Pleiads. This is consistent with the BSS being ...

  

Source: Complutense de Madrid, Universidad - Departamento de Astrofísica, Grupo de Actividad Estelar

 

Collection: Physics

 
82 A&A 402, 247252 (2003) DOI: 10.1051/0004-6361:20030266
 

Summary:  /L and logTeff. Our analysis shows that, for example, the values of log L/L at the zero age main sequence... after arriving at the zero age main sequence or 2) after about 30% of their life-time on the ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
83 hal-00199108,version1-18Dec2007 Star-Disk Interaction in Young Stars Proceedings IAU Symposium No. 243, 2007
 

Summary:  range from 1 Myr to the zero-age main sequence and beyond. For the first time, these results provide... the pre-main sequence (PMS) and on the zero-age main sequence (ZAMS) have been developped in the mid... ...

  

Source: Ecole Polytechnique, Centre de mathématiques

 

Collection: Mathematics

 
84 PRISTINE CNO ABUNDANCES FROM MAGELLANIC CLOUD B STARS. II. FAST ROTATORS IN THE LARGE MAGELLANIC CLOUD CLUSTER NGC 20041
 

Summary:  ), all three objects fall onto the main-sequence band, roughly halfway between the zero-age main sequence... indicates the zero-age main sequence for Z ¼ 0:008. Except for B30 in the blue Hertzsprung gap, all stars... ...

  

Source: Korn, Andreas - Uppsala Astronomical Observatory

 

Collection: Physics

 
85 A&A manuscript no. (will be inserted by hand later)
 

Summary:  years old, essentially zero­age main­sequence stars. We are not going to contribute to this discussion... in Taurus to reject the possibility that all ROSAT­detected sources could be zero­age main­sequence objects... survey, we consider two limiting cases: either the multiplicity of the ...

  

Source: Köhler, Rainer - Zentrum für Astronomie der universität Heidelberg, Landessternwarte Heidelberg-Königstuhl

 

Collection: Physics

 
86 November 3, 2011 Stellar Photometry and the Color-
 

Summary:  -R/CMD for stars near the Sun (distances from parallax). Width of main sequence is due to evolution from "zero-age... " main sequence and to unresolved binary stars. #12;Broad-band Photometry · Imaging through broad filters... out repeatedly during an exposure with the ...

  

Source: Glashausser, Charles - Department of Physics and Astronomy, Rutgers University

 

Collection: Physics

 
87 Astronomy & Astrophysics manuscript no. 5 c ESO 2008 January 17, 2008
 

Summary:  , from the zero age main sequence into the TP-AGB stage. We calculate two sets of model sequences... metallicity stars start- ing rigidly rotating at the zero-age main sequence, for initial masses of 1.0 M, 1... the rapidly ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
88 ON THE ROTATIONAL EVOLUTION OF SOLAR-AND LATE-TYPE STARS, ITS MAGNETIC ORIGINS, AND THE POSSIBILITY OF STELLAR GYROCHRONOLOGY1
 

Summary:  some stars from ever passing through a fast rotator phase near the zero-age main sequence... and collaborators among pre­main-sequence stars and the termi- nation of this bimodality when stars become fully... of clus- ter stars by invoking disk interaction on the pre­main ...

  

Source: Langer, Norbert - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
89 Abundance Anomalies in Globular Cluster Red Giant Stars
 

Summary:  they are initially fully convective and therefore low mass stars reach the zero age main sequence (ZAMS... . The star spends the majority of its time on the main sequence burning hydrogen in its core and increasing... the onset of the helium flash. #12; CHAPTER 1. ...

  

Source: Monash University, Centre for Stellar and Planetary Astrophysics

 

Collection: Physics

 
90 Radio Emission from Flares in Single Latetype Arnold O. Benz
 

Summary:  flares have yet been reported from main­sequence K stars. Best known is the near or zero­age main­sequence... . Radio emissions of single main­sequence F, G, and of many K stars have recently been discovered... of protostars, interacting binary systems and rapidly rotat­ ing ...

  

Source: Benz, Arnold - Institut für Astronomie, Eidgenössische Technische Hochschule Zürich (ETHZ)

 

Collection: Physics

 
91 An Observational Look at Rotating Stars
 

Summary:  during the pre-main sequence and zero age main sequence phases provides clues to the angular momentum... for instance, is demonstrated through the mean projected equatorial velocities of main-sequence stars... their lives on the ...

  

Source: Wiita, Paul J. - Department of Physics and Astronomy, Georgia State University

 

Collection: Physics

 
92 ISOLATED HERBIG AE/BE STARS: RARE EXAMPLES OF INDIVIDUAL HIGHMASS STARFORMING EVENTS
 

Summary:  (locations above the zero­age main sequence; low surface gravities), remnant pro­ tostellar disk... formation takes place, and the time sequence of star formation as a function of stellar mass (if... such a sequence exists) -- at the level of individual high­mass star­forming ...

  

Source: Hillenbrand, Lynne - Astronomy Department, California Institute of Technology

 

Collection: Physics

 
93 Performance Aspects Of Distributed Caches Using TTLbased Consistency
 

Summary:  provide a copy with zero age and thus a time­to­live (TTL) of T . Caches process the request by providing... . auth always provides a copy with zero age (TTL that equals the freshness lifetime). 2. exc: Let ff... through different types of sources. auth source always provides zero ...

  

Source: Cohen, Edith - AT&T Research

 

Collection: Computer Technologies and Information Sciences

 
94 Stellar structure and Sterrenstelsels & Kosmos
 

Summary:  #12;The "zero-age main sequence" · If we make models of stars of many different masses (but the same... of luminosities and temperatures that looks like the observed main sequence: · this is the "zero-age main sequence... " ...

  

Source: Weijgaert, Rien van de - Kapteyn Astronomical Institute, Rijksuniversiteit Groningen

 

Collection: Physics

 
95 Formation of Blue Stragglers and FK Comtype Stars K. Stepie'n
 

Summary:  The parameter­free formula for angular momentum loss (AML) rate of single, solar type main sequence (MS) stars... still on the zero age MS when they form a contact system. The contact phase lasts about 2 Gyr

  

Source: Stêpieñ, Kazimierz - Astronomical Observatory, Warsaw University

 

Collection: Physics

 
96 http://zhurnal.ape.relarn.ru/articles/2004/167.pdf1798 .., .. (mir@sai.msu.ru)
 

Summary:  Age Main Sequence) . . , . , . 0 0.265Y = , 0 0.025Z = a 0Y a 6... .5 . , . ( 1977) =1. , . , , , . , . , , , ( ZAMS , Zero

  

Source: Moscow University, Sternberg Astronomical Institute, Solar Studies Group

 

Collection: Physics

 
97 4. Galactic Chemical Evolution We have implemented our stellar models into the Chiappini 1997
 

Summary:  .5 0.6 0.7 0.8 0.9 1 SurfaceAbundanceof 23 Na(massfraction) Mass / Initial Mass Zero Age Main Sequence

  

Source: Izzard, Rob - Argelander Institute for Astronomy, Universität Bonn

 

Collection: Physics

 
98 AN XMM-NEWTON DEEP PENCIL BEAM SURVEY IN THE UPPER SCO-CEN STAR-FORMING REGION
 

Summary:  Schmidt CTIO telescope. The lines indicate the position of the Zero Age Main Sequence (ZAMS) for two... observation. The lines indicate the position of the Zero Age Main Sequence (ZAMS) and of the 10 Myr isocrones... on the ...

  

Source: Osservatorio Astronomico Di Palermo, Giuseppe S. Vaiana

 

Collection: Physics

 
99 Astron. Astrophys. 288, 475--501 (1994) ASTRONOMY ASTROPHYSICS
 

Summary:  ­dwarf, neutron­star, and stripped main­sequence­star companions; the fifth type are single, merged main­sequence... , and the occurrence of `blue interlopers' below the main sequence. Send offprint requests to: O.R. Pols ? Present... , which are bluer and often brighter than the ...

  

Source: Pols, Onno - Sterrenkundig Instituut, Universiteit Utrecht

 

Collection: Physics

 
100 January 10, 2006 Constraints on Stellar Structure and Evolution 1 log( Te ) ( K )
 

Summary:  the zero age main sequence, the evolutionary tracks and the boundary of the region where the variables... the same zero age main sequence (ZAMS). Presumably stars at the end of their main ...

  

Source: Ulrich, Roger K. - Division of Astronomy and Astrophysics, University of California at Los Angeles

 

Collection: Physics


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