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Title:
The SDSS spectroscopic catalogue of white dwarf-main-sequence binaries: new identifications from DR 9-12
Authors:
Rebassa-Mansergas, A.; Ren, J. J.; Parsons, S. G.; Gänsicke, B. T.; Schreiber, M. R.; García-Berro, E.; Liu, X.-W.; Koester, D.
Affiliation:
AA(Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain; ), AB(Department of Astronomy, Peking University, Beijing 100871, P. R. China), AC(Instituto de Física y Astronomía, Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso, Chile), AD(Department of Physics, University of Warwick, Coventry CV4 7AL, UK), AE(Instituto de Física y Astronomía, Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso, Chile; Millenium Nucleus `Protoplanetary Disks in ALMA Early Science', Universidad de Valparaíso, Avenida Gran Bretaña 1111, Valparaíso, Chile), AF(Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain; Institute for Space Studies of Catalonia, c/Gran Capità 2-4, Edif. Nexus 201, E-08034 Barcelona, Spain), AG(Department of Astronomy, Peking University, Beijing 100871, P. R. China; Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, P. R. China), AH(Institut für Theoretische Physik und Astrophysik, University of Kiel, D-24098 Kiel, Germany)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 458, Issue 4, p.3808-3819 (MNRAS Homepage)
Publication Date:
06/2016
Origin:
OUP
Astronomy Keywords:
binaries: close, binaries: spectroscopic, stars: low-mass, white dwarfs
Abstract Copyright:
2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stw554
Bibliographic Code:
2016MNRAS.458.3808R

Abstract

We present an updated version of the spectroscopic catalogue of white dwarf-main-sequence (WDMS) binaries from the Sloan Digital Sky Survey (SDSS). We identify 938 WDMS binaries within the data releases (DR) 9-12 of SDSS plus 40 objects from DR 1-8 that we missed in our previous works, 646 of which are new. The total number of spectroscopic SDSS WDMS binaries increases to 3294. This is by far the largest and most homogeneous sample of compact binaries currently available. We use a decomposition/fitting routine to derive the stellar parameters of all systems identified here (white dwarf effective temperatures, surface gravities and masses, and secondary star spectral types). The analysis of the corresponding stellar parameter distributions shows that the SDSS WDMS binary population is seriously affected by selection effects. We also measure the Na I lambdalambda 8183.27, 8194.81 absorption doublet and H alpha emission radial velocities (RV) from all SDSS WDMS binary spectra identified in this work. 98 objects are found to display RV variations, 62 of which are new. The RV data are sufficient enough to estimate the orbital periods of three close binaries.

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