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Title: THE ORBIT OF THE CEPHEID V350 Sgr REVISITED

Abstract

'The Cepheid Mass Problem' is one of the fundamental tests of the understanding of stellar evolution. One of the foundations of measured masses for Cepheids for this question is binary orbits. V350 Sgr is a classical Cepheid in a binary system. New radial velocity data for the system have been obtained over the last several years, and are used to update the orbit. The secondary in the system has previously had its orbital velocity amplitude measured in the ultraviolet with the Hubble Space Telescope. This amplitude has been combined with the new orbit and the adopted mass of the secondary resulting in a Cepheid mass of 5.0 {+-} 0.8 M{sub sun}.

Authors:
 [1]; ; ;  [2];  [3]
  1. Smithsonian Astrophysical Observatory, MS 4, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. Sternberg Astronomical Institute of the Moscow State University, 13 Universitetskii Prospect, Moscow 119992 (Russian Federation)
  3. 7050 Bakerville Road, Waverly, TN 37185 (United States)
Publication Date:
OSTI Identifier:
21582874
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 142; Journal Issue: 3; Other Information: DOI: 10.1088/0004-6256/142/3/87; Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CEPHEIDS; MASS; ORBITS; RADIAL VELOCITY; STAR EVOLUTION; TELESCOPES; ULTRAVIOLET RADIATION; ELECTROMAGNETIC RADIATION; EVOLUTION; PULSATING VARIABLE STARS; RADIATIONS; STARS; VARIABLE STARS; VELOCITY

Citation Formats

Evans, Nancy Remage, Berdnikov, Leonid, Gorynya, Natalia, Rastorguev, Alexey, and Eaton, Joel, E-mail: nevans@cfa.harvard.edu, E-mail: nevans@cfa.harvard.edu. THE ORBIT OF THE CEPHEID V350 Sgr REVISITED. United States: N. p., 2011. Web. doi:10.1088/0004-6256/142/3/87.
Evans, Nancy Remage, Berdnikov, Leonid, Gorynya, Natalia, Rastorguev, Alexey, & Eaton, Joel, E-mail: nevans@cfa.harvard.edu, E-mail: nevans@cfa.harvard.edu. THE ORBIT OF THE CEPHEID V350 Sgr REVISITED. United States. doi:10.1088/0004-6256/142/3/87.
Evans, Nancy Remage, Berdnikov, Leonid, Gorynya, Natalia, Rastorguev, Alexey, and Eaton, Joel, E-mail: nevans@cfa.harvard.edu, E-mail: nevans@cfa.harvard.edu. Thu . "THE ORBIT OF THE CEPHEID V350 Sgr REVISITED". United States. doi:10.1088/0004-6256/142/3/87.
@article{osti_21582874,
title = {THE ORBIT OF THE CEPHEID V350 Sgr REVISITED},
author = {Evans, Nancy Remage and Berdnikov, Leonid and Gorynya, Natalia and Rastorguev, Alexey and Eaton, Joel, E-mail: nevans@cfa.harvard.edu, E-mail: nevans@cfa.harvard.edu},
abstractNote = {'The Cepheid Mass Problem' is one of the fundamental tests of the understanding of stellar evolution. One of the foundations of measured masses for Cepheids for this question is binary orbits. V350 Sgr is a classical Cepheid in a binary system. New radial velocity data for the system have been obtained over the last several years, and are used to update the orbit. The secondary in the system has previously had its orbital velocity amplitude measured in the ultraviolet with the Hubble Space Telescope. This amplitude has been combined with the new orbit and the adopted mass of the secondary resulting in a Cepheid mass of 5.0 {+-} 0.8 M{sub sun}.},
doi = {10.1088/0004-6256/142/3/87},
journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 3,
volume = 142,
place = {United States},
year = {2011},
month = {9}
}