THE ORBIT OF THE CEPHEID V350 Sgr REVISITED

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/142/3/87· OSTI ID:21582874

Evans, Nancy Remage ^[1]; Berdnikov, Leonid; Gorynya, Natalia; Rastorguev, Alexey ^[2]; Eaton, Joel ^[3]

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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)

'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}.

• OSTI ID: 21582874
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 142, Issue 3; Other Information: DOI: 10.1088/0004-6256/142/3/87; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

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