Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors
Abstract
The astrophysical production site of the heaviest elements in the universe remains a mystery. Incorporating heavy-element signatures of metal-poor, $r$-process-enhanced stars into theoretical studies of $r$-process production can offer crucial constraints on the origin of heavy elements. In this study, we introduce and apply the "actinide-dilution with matching" model to a variety of stellar groups, ranging from actinide-deficient to actinide-enhanced, to empirically characterize r-process ejecta mass as a function of electron fraction. We find that actinide-boost stars do not indicate the need for a unique and separate $r$-process progenitor. Rather, small variations of neutron richness within the same type of $r$-process event can account for all observed levels of actinide enhancements. The very low-$$Y_e$$ , fission-cycling ejecta of an $r$-process event need only constitute 10%–30% of the total ejecta mass to accommodate most actinide abundances of metal-poor stars. We find that our empirical $$Y_e$$ distributions of ejecta are similar to those inferred from studies of GW170817 mass ejecta ratios, which is consistent with neutron-star mergers being a source of the heavy elements in metal-poor, $r$-process-enhanced stars.
- Authors:
-
[1];
[2];
[3];
[4];
[5];
[1]
- Univ. of Notre Dame, IN (United States). Dept. of Physics; Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States)
- Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
- Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States); North Carolina State Univ., Raleigh, NC (United States) Dept. of Physics
- Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
- Univ. of Notre Dame, IN (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26)
- OSTI Identifier:
- 1565905
- Report Number(s):
- LA-UR-19-23313
Journal ID: ISSN 1538-4357; TRN: US2000941
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 881; Journal Issue: 1; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Atomic, Nuclear and Particle Physics; Astronomy and Astrophysics
Citation Formats
Holmbeck, Erika M., Frebel, Anna, McLaughlin, G. C., Mumpower, Matthew R., Sprouse, Trevor M., and Surman, Rebecca. Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors. United States: N. p., 2019.
Web. doi:10.3847/1538-4357/ab2a01.
Holmbeck, Erika M., Frebel, Anna, McLaughlin, G. C., Mumpower, Matthew R., Sprouse, Trevor M., & Surman, Rebecca. Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors. United States. doi:10.3847/1538-4357/ab2a01.
Holmbeck, Erika M., Frebel, Anna, McLaughlin, G. C., Mumpower, Matthew R., Sprouse, Trevor M., and Surman, Rebecca. Tue .
"Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors". United States. doi:10.3847/1538-4357/ab2a01. https://www.osti.gov/servlets/purl/1565905.
@article{osti_1565905,
title = {Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors},
author = {Holmbeck, Erika M. and Frebel, Anna and McLaughlin, G. C. and Mumpower, Matthew R. and Sprouse, Trevor M. and Surman, Rebecca},
abstractNote = {The astrophysical production site of the heaviest elements in the universe remains a mystery. Incorporating heavy-element signatures of metal-poor, $r$-process-enhanced stars into theoretical studies of $r$-process production can offer crucial constraints on the origin of heavy elements. In this study, we introduce and apply the "actinide-dilution with matching" model to a variety of stellar groups, ranging from actinide-deficient to actinide-enhanced, to empirically characterize r-process ejecta mass as a function of electron fraction. We find that actinide-boost stars do not indicate the need for a unique and separate $r$-process progenitor. Rather, small variations of neutron richness within the same type of $r$-process event can account for all observed levels of actinide enhancements. The very low-$Y_e$ , fission-cycling ejecta of an $r$-process event need only constitute 10%–30% of the total ejecta mass to accommodate most actinide abundances of metal-poor stars. We find that our empirical $Y_e$ distributions of ejecta are similar to those inferred from studies of GW170817 mass ejecta ratios, which is consistent with neutron-star mergers being a source of the heavy elements in metal-poor, $r$-process-enhanced stars.},
doi = {10.3847/1538-4357/ab2a01},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 881,
place = {United States},
year = {2019},
month = {8}
}
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Works referenced in this record:
Some Nucleosynthesis Effects Associated with r ‐Process Jets
journal, April 2003
- Cameron, A. G. W.
- The Astrophysical Journal, Vol. 587, Issue 1
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models
journal, October 2017
- Cowperthwaite, P. S.; Berger, E.; Villar, V. A.
- The Astrophysical Journal, Vol. 848, Issue 2
The R -Process Alliance: 2MASS J09544277+5246414, the Most Actinide-enhanced R -II Star Known
journal, June 2018
- Holmbeck, Erika M.; Beers, Timothy C.; Roederer, Ian U.
- The Astrophysical Journal, Vol. 859, Issue 2
ON THE r -PROCESS ENRICHMENT OF DWARF SPHEROIDAL GALAXIES
journal, July 2016
- Bramante, Joseph; Linden, Tim
- The Astrophysical Journal, Vol. 826, Issue 1
Microscopic mass formulas
journal, July 1995
- Duflo, J.; Zuker, A. P.
- Physical Review C, Vol. 52, Issue 1
Time-dependent models of accretion discs formed from compact object mergers
journal, September 2008
- Metzger, B. D.; Piro, A. L.; Quataert, E.
- Monthly Notices of the Royal Astronomical Society
r ‐Process Abundances and Chronometers in Metal‐poor Stars
journal, August 1999
- Cowan, John J.; Pfeiffer, B.; Kratz, K. ‐L.
- The Astrophysical Journal, Vol. 521, Issue 1
Skyrme-Hartree-Fock-Bogoliubov Nuclear Mass Formulas: Crossing the 0.6 MeV Accuracy Threshold with Microscopically Deduced Pairing
journal, April 2009
- Goriely, S.; Chamel, N.; Pearson, J. M.
- Physical Review Letters, Vol. 102, Issue 15
The r ‐Process–enriched Low‐Metallicity Giant HD 115444
journal, February 2000
- Westin, Jenny; Sneden, Christopher; Gustafsson, Bengt
- The Astrophysical Journal, Vol. 530, Issue 2
Silver and palladium help unveil the nature of a second r-process
journal, August 2012
- Hansen, C. J.; Primas, F.; Hartman, H.
- Astronomy & Astrophysics, Vol. 545
High-resolution abundance analysis of very metal-poor r-I stars
journal, May 2014
- Siqueira Mello, C.; Hill, V.; Barbuy, B.
- Astronomy & Astrophysics, Vol. 565
The Origin of r -process Enhanced Metal-poor Halo Stars In Now-destroyed Ultra-faint Dwarf Galaxies
journal, February 2019
- Brauer, Kaley; Ji, Alexander P.; Frebel, Anna
- The Astrophysical Journal, Vol. 871, Issue 2
THE r -PROCESS NUCLEOSYNTHESIS IN THE VARIOUS JET-LIKE EXPLOSIONS OF MAGNETOROTATIONAL CORE-COLLAPSE SUPERNOVAE
journal, September 2015
- Nishimura, Nobuya; Takiwaki, Tomoya; Thielemann, Friedrich-Karl
- The Astrophysical Journal, Vol. 810, Issue 2
r -process Enrichment of the Ultra-faint Dwarf Galaxies by Fast-merging Double-neutron Stars
journal, February 2019
- Safarzadeh, Mohammadtaher; Ramirez-Ruiz, Enrico; Andrews, Jeff. J.
- The Astrophysical Journal, Vol. 872, Issue 1
New Finite-Range Droplet Mass Model and Equation-of-State Parameters
journal, January 2012
- Möller, Peter; Myers, William D.; Sagawa, Hiroyuki
- Physical Review Letters, Vol. 108, Issue 5
The Hamburg/ESO R-process Enhanced Star survey (HERES): VII. Thorium abundances in metal-poor stars
journal, January 2012
- Ren, J.; Christlieb, N.; Zhao, G.
- Astronomy & Astrophysics, Vol. 537
The r -process Pattern of a Bright, Highly r -process-enhanced Metal-poor Halo Star at [Fe/H] ∼ −2
journal, February 2018
- Sakari, Charli M.; Placco, Vinicius M.; Hansen, Terese
- The Astrophysical Journal, Vol. 854, Issue 2
Light curves of the neutron star merger GW170817/SSS17a: Implications for r-process nucleosynthesis
journal, October 2017
- Drout, M. R.; Piro, A. L.; Shappee, B. J.
- Science, Vol. 358, Issue 6370
Outflows from accretion discs formed in neutron star mergers: effect of black hole spin
journal, November 2014
- Fernández, Rodrigo; Kasen, Daniel; Metzger, Brian D.
- Monthly Notices of the Royal Astronomical Society, Vol. 446, Issue 1
Chemical Evolution in Hierarchical Models of Cosmic Structure. ii. the Formation of the Milky way Stellar halo and the Distribution of the Oldest Stars
journal, December 2009
- Tumlinson, Jason
- The Astrophysical Journal, Vol. 708, Issue 2
Californium-254 and Kilonova Light Curves
journal, August 2018
- Zhu, Y.; Wollaeger, R. T.; Vassh, N.
- The Astrophysical Journal, Vol. 863, Issue 2
Origin of the heavy elements in binary neutron-star mergers from a gravitational-wave event
journal, October 2017
- Kasen, Daniel; Metzger, Brian; Barnes, Jennifer
- Nature, Vol. 551, Issue 7678
Fission barriers at the end of the chart of the nuclides
journal, February 2015
- Möller, Peter; Sierk, Arnold J.; Ichikawa, Takatoshi
- Physical Review C, Vol. 91, Issue 2
RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey
journal, July 2017
- Placco, Vinicius M.; Holmbeck, Erika M.; Frebel, Anna
- The Astrophysical Journal, Vol. 844, Issue 1
Symmetric and standard matter neutrino resonances above merging compact objects
journal, February 2016
- Malkus, A.; McLaughlin, G. C.; Surman, R.
- Physical Review D, Vol. 93, Issue 4
The impact of individual nuclear properties on -process nucleosynthesis
journal, January 2016
- Mumpower, M. R.; Surman, R.; McLaughlin, G. C.
- Progress in Particle and Nuclear Physics, Vol. 86
Nuclear ground-state masses and deformations: FRDM(2012)
journal, May 2016
- Möller, P.; Sierk, A. J.; Ichikawa, T.
- Atomic Data and Nuclear Data Tables, Vol. 109-110
Insight into the Formation of the Milky way Through cold halo Substructure. i. the Echos of Milky way Formation
journal, September 2009
- Schlaufman, Kevin C.; Rockosi, Constance M.; Prieto, Carlos Allende
- The Astrophysical Journal, Vol. 703, Issue 2
Neutron Star Mergers Might Not Be the Only Source of r -process Elements in the Milky Way
journal, April 2019
- Côté, Benoit; Eichler, Marius; Arcones, Almudena
- The Astrophysical Journal, Vol. 875, Issue 2
Primordial Black Holes and -Process Nucleosynthesis
journal, August 2017
- Fuller, George M.; Kusenko, Alexander; Takhistov, Volodymyr
- Physical Review Letters, Vol. 119, Issue 6
The R -process Alliance: First Release from the Southern Search for R -process-enhanced Stars in the Galactic Halo
journal, May 2018
- Hansen, Terese T.; Holmbeck, Erika M.; Beers, Timothy C.
- The Astrophysical Journal, Vol. 858, Issue 2
Are There any Stars Lacking Neutron-Capture Elements? Evidence from Strontium and Barium
journal, December 2012
- Roederer, Ian U.
- The Astronomical Journal, Vol. 145, Issue 1
JINAbase—A Database for Chemical Abundances of Metal-poor Stars
journal, October 2018
- Abohalima, Abdu; Frebel, Anna
- The Astrophysical Journal Supplement Series, Vol. 238, Issue 2
On the astrophysical robustness of the neutron star merger r-process: Robust r-process in neutron star mergers
journal, October 2012
- Korobkin, O.; Rosswog, S.; Arcones, A.
- Monthly Notices of the Royal Astronomical Society, Vol. 426, Issue 3
[CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers
journal, November 1999
- Freiburghaus, C.; Rosswog, S.; Thielemann, F. -K.
- The Astrophysical Journal, Vol. 525, Issue 2
NLTE strontium abundance in a sample of extremely metal poor stars and the Sr/Ba ratio in the early Galaxy
journal, May 2011
- Andrievsky, S. M.; Spite, F.; Korotin, S. A.
- Astronomy & Astrophysics, Vol. 530
Nucleosynthesis in Outflows from the Inner Regions of Collapsars
journal, May 2004
- Pruet, Jason; Thompson, Todd A.; Hoffman, R. D.
- The Astrophysical Journal, Vol. 606, Issue 2
Synthesis of the Elements in Stars
journal, October 1957
- Burbidge, E. Margaret; Burbidge, G. R.; Fowler, William A.
- Reviews of Modern Physics, Vol. 29, Issue 4
Nuclear properties for astrophysical and radioactive-ion-beam applications (II)
journal, January 2019
- Möller, P.; Mumpower, M. R.; Kawano, T.
- Atomic Data and Nuclear Data Tables, Vol. 125
DETAILED CHEMICAL ABUNDANCES IN THE r -PROCESS-RICH ULTRA-FAINT DWARF GALAXY RETICULUM 2
journal, February 2016
- Roederer, Ian U.; Mateo, Mario; Iii, John I. Bailey
- The Astronomical Journal, Vol. 151, Issue 3
Decompression of initially cold neutron star matter - A mechanism for the r-process?
journal, August 1989
- Meyer, Bradley S.
- The Astrophysical Journal, Vol. 343
Using excitation-energy dependent fission yields to identify key fissioning nuclei in r -process nucleosynthesis
journal, April 2019
- Vassh, N.; Vogt, R.; Surman, R.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 6
Neutrino-driven winds from neutron star merger remnants
journal, August 2014
- Perego, A.; Rosswog, S.; Cabezon, R. M.
- Monthly Notices of the Royal Astronomical Society, Vol. 443, Issue 4
Statistical Hauser-Feshbach theory with width-fluctuation correction including direct reaction channels for neutron-induced reactions at low energies
journal, July 2016
- Kawano, T.; Capote, R.; Hilaire, S.
- Physical Review C, Vol. 94, Issue 1
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
journal, October 2017
- Abbott, B. P.; Abbott, R.; Abbott, T. D.
- Physical Review Letters, Vol. 119, Issue 16
Electromagnetic evidence that SSS17a is the result of a binary neutron star merger
journal, October 2017
- Kilpatrick, C. D.; Foley, R. J.; Kasen, D.
- Science, Vol. 358, Issue 6370
THE ROLE OF FISSION IN NEUTRON STAR MERGERS AND ITS IMPACT ON THE r -PROCESS PEAKS
journal, July 2015
- Eichler, M.; Arcones, A.; Kelic, A.
- The Astrophysical Journal, Vol. 808, Issue 1
Nuclear-structure input to r-process calculations
journal, February 1998
- Kratz, K. -L.; Pfeiffer, B.; Thielemann, F. -K.
- Nuclear Physics A, Vol. 630, Issue 1-2
Actinide Production in the Neutron-rich Ejecta of a Neutron Star Merger
journal, December 2018
- Holmbeck, Erika M.; Sprouse, Trevor M.; Mumpower, Matthew R.
- The Astrophysical Journal, Vol. 870, Issue 1
Collapsars as a major source of r-process elements
journal, May 2019
- Siegel, Daniel M.; Barnes, Jennifer; Metzger, Brian D.
- Nature, Vol. 569, Issue 7755
From Actinides to Zinc: Using the Full Abundance Pattern of the Brightest Star in Reticulum II to Distinguish between Different r -process Sites
journal, April 2018
- Ji, Alexander P.; Frebel, Anna
- The Astrophysical Journal, Vol. 856, Issue 2
Compositions of halo clusters and the formation of the galactic halo
journal, October 1978
- Searle, L.; Zinn, R.
- The Astrophysical Journal, Vol. 225
The Hamburg/ESO R-process enhanced star survey (HERES): II. Spectroscopic analysis of the survey sample
journal, July 2005
- Barklem, P. S.; Christlieb, N.; Beers, T. C.
- Astronomy & Astrophysics, Vol. 439, Issue 1
β -delayed Fission in r -process Nucleosynthesis
journal, December 2018
- Mumpower, M. R.; Kawano, T.; Sprouse, T. M.
- The Astrophysical Journal, Vol. 869, Issue 1
Estimation of scissors mode strength for deformed nuclei in the medium- to heavy-mass region by statistical Hauser-Feshbach model calculations
journal, August 2017
- Mumpower, M. R.; Kawano, T.; Ullmann, J. L.
- Physical Review C, Vol. 96, Issue 2
From Nuclei to the Cosmos: Tracing Heavy-Element Production with the Oldest Stars
journal, October 2018
- Frebel, Anna
- Annual Review of Nuclear and Particle Science, Vol. 68, Issue 1
R-process enrichment from a single event in an ancient dwarf galaxy
journal, March 2016
- Ji, Alexander P.; Frebel, Anna; Chiti, Anirudh
- Nature, Vol. 531, Issue 7596
Neutrinos and Nucleosynthesis in Gamma‐Ray Burst Accretion Disks
journal, March 2004
- Surman, Rebecca; McLaughlin, Gail C.
- The Astrophysical Journal, Vol. 603, Issue 2
Thorium and Uranium Chronometers Applied to CS 31082‐001
journal, November 2002
- Schatz, Hendrik; Toenjes, Ralf; Pfeiffer, Bernd
- The Astrophysical Journal, Vol. 579, Issue 2
Charged-Particle and Neutron-Capture Processes in the High-Entropy wind of Core-Collapse Supernovae
journal, March 2010
- Farouqi, K.; Kratz, K. -L.; Pfeiffer, B.
- The Astrophysical Journal, Vol. 712, Issue 2
The Hamburg/ESO R-process Enhanced Star survey (HERES): X. HE 2252−4225, one more r-process enhanced and actinide-boost halo star
journal, September 2014
- Mashonkina, L.; Christlieb, N.; Eriksson, K.
- Astronomy & Astrophysics, Vol. 569
r -process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae
journal, September 2018
- Mösta, Philipp; Roberts, Luke F.; Halevi, Goni
- The Astrophysical Journal, Vol. 864, Issue 2
COMPLETE ELEMENT ABUNDANCES OF NINE STARS IN THE r -PROCESS GALAXY RETICULUM II
journal, October 2016
- Ji, Alexander P.; Frebel, Anna; Simon, Joshua D.
- The Astrophysical Journal, Vol. 830, Issue 2
Neutrino-driven wind simulations and nucleosynthesis of heavy elements
journal, November 2012
- Arcones, A.; Thielemann, F-K
- Journal of Physics G: Nuclear and Particle Physics, Vol. 40, Issue 1
Binary Neutron Star Mergers: Mass Ejection, Electromagnetic Counterparts, and Nucleosynthesis
journal, December 2018
- Radice, David; Perego, Albino; Hotokezaka, Kenta
- The Astrophysical Journal, Vol. 869, Issue 2
Production of heavy and superheavy neutron-rich nuclei in neutron capture processes
journal, October 2011
- Zagrebaev, V. I.; Karpov, A. V.; Mishustin, I. N.
- Physical Review C, Vol. 84, Issue 4
The Origin of r -process Elements in the Milky Way
journal, March 2018
- Côté, Benoit; Fryer, Chris L.; Belczynski, Krzysztof
- The Astrophysical Journal, Vol. 855, Issue 2
Early spectra of the gravitational wave source GW170817: Evolution of a neutron star merger
journal, October 2017
- Shappee, B. J.; Simon, J. D.; Drout, M. R.
- Science, Vol. 358, Issue 6370
The r ‐Process in the Neutrino Winds of Core‐Collapse Supernovae and U‐Th Cosmochronology
journal, October 2002
- Wanajo, Shinya; Itoh, Naoki; Ishimaru, Yuhri
- The Astrophysical Journal, Vol. 577, Issue 2
Isotopic r-process abundances and nuclear structure far from stability - Implications for the r-process mechanism
journal, January 1993
- Kratz, Karl-Ludwig; Bitouzet, Jean-Philippe; Thielemann, Friedrich-Karl
- The Astrophysical Journal, Vol. 403
MAGNETOROTATIONALLY DRIVEN SUPERNOVAE AS THE ORIGIN OF EARLY GALAXY r -PROCESS ELEMENTS?
journal, April 2012
- Winteler, C.; Käppeli, R.; Perego, A.
- The Astrophysical Journal, Vol. 750, Issue 1
Kinematics of Highly r -process-enhanced Field Stars: Evidence for an Accretion Origin and Detection of Several Groups from Disrupted Satellites
journal, October 2018
- Roederer, Ian U.; Hattori, Kohei; Valluri, Monica
- The Astronomical Journal, Vol. 156, Issue 4
Matplotlib: A 2D Graphics Environment
journal, January 2007
- Hunter, John D.
- Computing in Science & Engineering, Vol. 9, Issue 3
Galactic Evolution of Sr, Y, and Zr: A Multiplicity of Nucleosynthetic Processes
journal, February 2004
- Travaglio, Claudia; Gallino, Roberto; Arnone, Enrico
- The Astrophysical Journal, Vol. 601, Issue 2
The role of neutrinos in r -process nucleosynthesis in supernovae and gamma-ray bursts
journal, December 2007
- Surman, R.; Beun, J.; McLaughlin, G. C.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 35, Issue 1
What are the astrophysical sites for the r-process and the production of heavy elements?
journal, April 2011
- Thielemann, F. -K.; Arcones, A.; Käppeli, R.
- Progress in Particle and Nuclear Physics, Vol. 66, Issue 2
Detection of Neutral Phosphorus in the Near-Ultraviolet Spectra of Late-Type Stars
journal, November 2014
- Roederer, Ian U.; Jacobson, Heather R.; Thanathibodee, Thanawuth
- The Astrophysical Journal, Vol. 797, Issue 1
An r -process Enhanced Star in the Dwarf Galaxy Tucana III
journal, March 2017
- Hansen, T. T.; Simon, J. D.; Marshall, J. L.
- The Astrophysical Journal, Vol. 838, Issue 1
The NumPy Array: A Structure for Efficient Numerical Computation
journal, March 2011
- van der Walt, Stéfan; Colbert, S. Chris; Varoquaux, Gaël
- Computing in Science & Engineering, Vol. 13, Issue 2
A Search for Stars of very low Metal Abundance. vi. Detailed Abundances of 313 Metal-Poor Stars
journal, May 2014
- Roederer, Ian U.; Preston, George W.; Thompson, Ian B.
- The Astronomical Journal, Vol. 147, Issue 6
The Discovery and Analysis of Very Metal-Poor Stars in the Galaxy
journal, September 2005
- Beers, Timothy C.; Christlieb, Norbert
- Annual Review of Astronomy and Astrophysics, Vol. 43, Issue 1
THE r -PROCESS IN PROTO-NEUTRON-STAR WIND REVISITED
journal, May 2013
- Wanajo, Shinya
- The Astrophysical Journal, Vol. 770, Issue 2
Black-hole-neutron-star collisions
journal, September 1974
- Lattimer, J. M.; Schramm, D. N.
- The Astrophysical Journal, Vol. 192
R-process nucleosynthesis and nuclei far from the region of β-stability
journal, March 1975
- Kodama, Takeshi; Takahashi, Kohji
- Nuclear Physics A, Vol. 239, Issue 3
The r ‐Process in Supernovae: Impact of New Microscopic Mass Formulae
journal, May 2004
- Wanajo, Shinya; Goriely, Stephane; Samyn, Mathieu
- The Astrophysical Journal, Vol. 606, Issue 2
The Hamburg/ESO R-process Enhanced Star survey (HERES): VIII. The r+s star HE 1405−0822⋆⋆
journal, October 2013
- Cui, W. Y.; Sivarani, T.; Christlieb, N.
- Astronomy & Astrophysics, Vol. 558
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journal, January 2020
- Tsujimoto, Takuji; Nishimura, Nobuya; Kyutoku, Koutarou
- The Astrophysical Journal, Vol. 889, Issue 2