New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12

By S. O. Kepler, I. Pelisoli, D. Koester, G. Ourique, A. Romero, N. Reindl, S. Kleinman, Daniel J. Eisenstein, A. D. M. Valois, L. A. Amaral. 2015

196 citations recorded by the source corpus.

White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of each population. Examining the spectra of all stars with $3\sigma$ proper motion in the Sloan Digital Sky Survey Data Release 14, we report the classification for 20 088 spectroscopically confirmed white dwarfs, plus 415 hot subdwarfs, and 311 cataclysmic variables. We obtain Teff, log g and mass for hydrogen atmosphere white dwarf stars (DAs), warm helium atmosphere white dwarfs (DBs), hot subdwarfs (sdBs and sdOs), and estimate photometric Teff for white dwarf stars with continuum spectra (DCs). We find 15793 sdAs and 447 dCs between the white dwarf cooling sequence and the main sequence, especially below Teff= 10000 K; most are likely low-mass metal-poor main sequence stars, but some could be the result of interacting binary evolution.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/1486040f398a497619016fbccd4630783ebd5240

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In Astronomy and Astrophysics

1. P.-E. Tremblay
2. Pierre Bergeron
3. B. Gänsicke
4. G. Fontaine
5. P. Brassard
6. T. Tauris
7. P. Marchant
8. N. Langer

In Instrumentation

1. P.-E. Tremblay
2. Pierre Bergeron
3. B. Gänsicke
4. G. Fontaine
5. P. Brassard
6. J. Cummings
7. A. Bédard
8. S. Toonen

Citations in the corpus

• On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model Atmosphere Analysis of Hot White Dwarfs from SDSS DR12 (2020, methodology): “…evolution were made possible by the Sloan Digital Sky Survey (SDSS; York et al. 2000), which revolutionized the white dwarf field by increasing the number of spectroscopically identified white dwarfs more than tenfold (Eisenstein et al. 2006a; Kleinman et al. 2013; Kepler et al. 2015, 2016, 2019).”
• Models of low-mass helium white dwarfs including gravitational settling, thermal and chemical diffusion, and rotational mixing (2016, background): “A large number of such objects have been discovered in recent years through dedicated or general surveys such as ELM, SPY, WASP, SDSS and the Kepler mission (e.g. Brown et al. 2010, 2012, 2013, 2016; Kilic et al. 2011, 2012; Koester et al. 2009; Maxted et al. 2011; Kepler et al. 2016).”
• AGaiaData Release 2 catalogue of white dwarfs and a comparison with SDSS (2018, background): “…majority of the ≃ 33 000 spectroscopically confirmed white dwarfs known to date were discovered in the last 20 years thanks to large area spectroscopic surveys, most notably the Sloan Digital Sky Survey (SDSS; York et al. 2000, Eisenstein et al. 2006, Kleinman et al. 2013, Kepler et al. 2016b).”