SINGLE-LINED SPECTROSCOPIC BINARY STAR CANDIDATES IN THE RAVE SURVEY

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

DOI:https://doi.org/10.1088/0004-6256/141/6/200· OSTI ID:21583098

Matijevic, G; Zwitter, T ^[1]; Bienayme, O; Siebert, A; Watson, F G ^[2]; Bland-Hawthorn, J; Parker, Q A ^[3]; Freeman, K C ^[4]; Gilmore, G ^[5]; Grebel, E K ^[6]; Helmi, A ^[7]; Munari, U; Siviero, A ^[8]; Navarro, J F ^[9]; Reid, W ^[10]; Seabroke, G M ^[11]; Steinmetz, M; Williams, M ^[12]; Wyse, R F. G., ^[13]

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1. University of Ljubljana, Faculty of Mathematics and Physics, 1000 Ljubljana (Slovenia)
2. Observatoire de Strasbourg, Universite de Strasbourg, CNRS, 67000 Strasbourg (France)
3. Australian Astronomical Observatory, Epping, NSW 1710 (Australia)
4. RSAA, Australian National University, Canberra (Australia)
5. Institute of Astronomy, Cambridge (United Kingdom)
6. Astronomisches Rechen-Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Heidelberg (Germany)
7. Kapteyn Astronomical Institute, University of Groningen, Groningen (Netherlands)
8. INAF Osservatorio Astronomico di Padova, Asiago (Italy)
9. Department of Physics and Astronomy, University of Victoria, Victoria (Canada)
10. Department of Physics and Astronomy, Macquarie University, Sydney (Australia)
11. Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, RH5 6NT (United Kingdom)
12. Leibniz-Institut fr Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam (Germany)
13. Department of Physics and Astronomy, John Hopkins University, Baltimore, Maryland (United States)

Repeated spectroscopic observations of stars in the RAdial Velocity Experiment (RAVE) database are used to identify and examine single-lined binary (SB1) candidates. The RAVE latest internal database (VDR3) includes radial velocities, atmospheric parameters, and other parameters for approximately a quarter of a million different stars with slightly less than 300,000 observations. In the sample of {approx}20,000 stars observed more than once, 1333 stars with variable radial velocities were identified. Most of them are believed to be SB1 candidates. The fraction of SB1 candidates among stars with several observations is between 10% and 15% which is the lower limit for binarity among RAVE stars. Due to the distribution of time spans between the re-observation that is biased toward relatively short timescales (days to weeks), the periods of the identified SB1 candidates are most likely in the same range. Because of the RAVE's narrow magnitude range most of the dwarf candidates belong to the thin Galactic disk while the giants are part of the thick disk with distances extending to up to a few kpc. The comparison of the list of SB1 candidates to the VSX catalog of variable stars yielded several pulsating variables among the giant population with radial velocity variations of up to few tens of km s{sup -1}. There are 26 matches between the catalog of spectroscopic binary orbits (S{sub B}{sup 9}) and the whole RAVE sample for which the given periastron time and the time of RAVE observation were close enough to yield a reliable comparison. RAVE measurements of radial velocities of known spectroscopic binaries are consistent with their published radial velocity curves.

• OSTI ID: 21583098
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 141, Issue 6; Other Information: DOI: 10.1088/0004-6256/141/6/200; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BINARY STARS
CATALOGS
DATA ANALYSIS
DISTANCE
ORBITS
RADIAL VELOCITY
VARIABLE STARS
DOCUMENT TYPES
STARS
VELOCITY