Single-lined Spectroscopic Binary Star Candidates from a Combination of the RAVE and Gaia DR2 Surveys
Year: 2019
Type: article
Abstract: The combination of the final version of the Radial Velocity Experiment (RAVE) spectroscopic survey data release 6 with radial velocities (RVs) and astrometry from Gaia DR2 allows us to identify and create a catalog of single-lined binary star candidates (SB1), their inferred orbital parameters, and to inspect possible double-lined binary stars (SB2). A probability function for the detection of RV variations is used for identifying SB1 candidates. The estimation of orbital parameters for main-sequence dwarfs is performed by matching the measured RVs with theoretical velocity curves sampling the orbital parameter space. The method is verified by studying a mock sample from the SB 9 catalog. Studying the boxiness and asymmetry of the spectral lines allows us to identify possible SB2 candidates, while matching their spectra to a synthetic library indicates probable properties of their components. From the RAVE catalog we select 37,664 stars with multiple RV measurements and identify 3838 stars as SB1 candidates. Joining Rave and Gaia DR2 yields 450,646 stars with RVs measured by both surveys and 27,716 of them turn out to be SB1 candidates, which is an increase by an order of magnitude over previous studies. For main-sequence dwarf candidates we calculate their most probable orbital parameters: orbital periods are not longer than a few years and primary components have masses similar to the solar mass. All our results are available in the electronic version.
Source: The Astronomical Journal
Authors: Danijela Birko, Tomaž Zwitter, Eva K. Grebel, Quentin A Parker, Georges Kordopatis, Joss Bland-Hawthorn, Kenneth Freeman, Guillaume Guiglion, Brad K. Gibson, Julio Navarro, Warren Reid, G. M. Seabroke, Matthias Steinmetz, Fred Watson
Institutions: University of Ljubljana, Heidelberg University, Cyberport, University of Hong Kong, Centre National de la Recherche Scientifique, Université Côte d'Azur, Lagrange Laboratory, Observatoire de la Côte d’Azur, The University of Sydney, Australian National University, Leibniz Institute for Astrophysics Potsdam, University of Lancashire, University of Victoria, Western Sydney University, Macquarie University, University College London, Australian Astronomical Observatory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, W. M. Keck Foundation, Johns Hopkins University, European Space Agency, Australian National University, Macquarie University, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Javna Agencija za Raziskovalno Dejavnost RS, Istituto Nazionale di Astrofisica, Leibniz-Institut für Astrophysik Potsdam, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council, Australian Research Council, Leibniz-Gemeinschaft, Australian Astronomical Optics-Macquarie, FP7 Ideas: European Research Council
OpenAlex ID: W2955743021