Single-lined Spectroscopic Binary Star Candidates in the RAVE Survey

Abstract

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 and other parameters for approximately quarter million of different stars with little less than 300,000 observations. In the sample of ~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 towards 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 the radial velocity variations of up to few tens of km/s. There are 26 matches between the catalog of spectroscopic binary orbits (SB9) 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.

10 pages, 7 figures, accepted for publication in AJ

References in corpus (10)

• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• The Radial Velocity Experiment (RAVE): first data release
• The High Angular Resolution Multiplicity of Massive Stars
• The ACS Nearby Galaxy Survey Treasury IX. Constraining asymptotic giant branch evolution with old metal-poor galaxies
• Stellar Multiplicity and the IMF: Most Stars Are Single
• The Radial Velocity Experiment (RAVE): second data release
• The RAdial Velocity Experiment (RAVE): Third Data Release
• Distance determination for RAVE stars using stellar models II: Most likely values assuming a standard stellar evolution scenario
• Double-lined Spectroscopic Binary Stars in the Radial Velocity Experiment Survey
• A search for spectroscopic binaries in the galactic globular cluster M4. Based on 5973 individual spectra collected at VLT

Cited by in corpus (22)

• The RAdial Velocity Experiment (RAVE): Fourth data release
• The wobbly Galaxy: kinematics north and south with RAVE red clump giants
• Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
• Discovery and Characterization of 3000+ Main-Sequence Binaries from APOGEE Spectra
• The Gaia-ESO Survey: double, triple and quadruple-line spectroscopic binary candidates
• Very metal-poor stars observed by the RAVE survey
• The Spectroscopic Binaries from LAMOST Medium-Resolution Survey (MRS). I. Searching for Double-lined Spectroscopic Binaries (SB2s) with Convolutional Neural Network
• A RAVE Investigation on Galactic open Clusters I. Radial velocities and metallicities
• What are the spectroscopic binaries with high mass functions near the Gaia DR3 main sequence?
• Chromospherically Active Stars in the RAVE Survey. I. The Catalogue
• The Gaia-ESO Survey: detection and characterization of single line spectroscopic binaries
• Features of Gaia DR3 Spectroscopic Binaries I. Tidal circularization of Main-Sequence Stars
• Data-driven spectroscopic estimates of absolute magnitude, distance and binarity -- method and catalog of 16,002 O- and B-type stars from LAMOST
• Single-lined Spectroscopic Binary Star Candidates from a Combination of the RAVE and Gaia DR2 surveys
• A Catalog of Short Period Spectroscopic and Eclipsing Binaries Identified from the LAMOST & PTF Surveys
• The GALAH+ Survey: A New Library of Observed Stellar Spectra Improves Radial Velocities and Hints at Motions within M67
• Are Lithium-Rich Giants Binaries? A Radial Velocity Variability Analysis of 1,400 Giants
• The GALAH survey: unresolved triple Sun-like stars discovered by the Gaia mission
• Robotic observations of the most eccentric spectroscopic binary in the sky
• The GALAH survey: Multiple stars and our Galaxy. I. A comprehensive method for deriving properties of FGK binary stars
• The First Data Release of LAMOST Low Resolution Single Epoch Spectra
• Identification of false positive double-lined spectroscopic binaries in LAMOST-MRS data due to moonlight contamination