SDSS DR7 WHITE DWARF CATALOG

By S. Kleinman, S. O. Kepler, D. Koester, I. Pelisoli, V. Pecanha, A. Nitta, J. E. S. Costa, J. Krzesinski, Patrick Dufour, François-René Lachapelle and 6 more. 2012

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We present a new catalog of spectroscopically confirmed white dwarf stars from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits to 14,120 DA and 1011 DB white dwarf spectra from 12,843 and 923 stars, respectively. These numbers represent more than a factor of two increase in the total number of white dwarf stars from the previous SDSS white dwarf catalogs based on DR4 data. Our distribution of subtypes varies from previous catalogs due to our more conservative, manual classifications of each star in our catalog, supplementing our automatic fits. In particular, we find a large number of magnetic white dwarf stars whose small Zeeman splittings mimic increased Stark broadening that would otherwise result in an overestimated log g if fit as a non-magnetic white dwarf. We calculate mean DA and DB masses for our clean, non-magnetic sample and find the DB mean mass is statistically larger than that for the DAs.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/42fc67b70e484dfe2af282f0d4e241df3da4b1fb

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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).”
AGaiaData Release 2 catalogue of white dwarfs and a comparison with SDSS (2018, background): “…decades, the number of known white dwarfs has rapidly grown from just over 2 000 (McCook & Sion 1999) to well over 30 000 (Eisenstein et al. 2006; Kleinman et al. 2013; Gentile Fusillo et al. 2015a; Kepler et al. 2015, 2016c; Gentile Fusillo et al. 2017b; Raddi et al. 2017), and it is clear that…”
The Half Million Quasars (HMQ) Catalogue (2015, background): “14 by Kleinman et al. (2013) which identified white dwarfs from the SDSS-DR7 data.”
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres (2013, methodology): “White dwarfs with hydrogen lines as their main spectral feature represent about 75% of all known degenerate stars (McCook & Sion 1999; Kleinman et al. 2013).”
Magnetic white dwarf stars in the Sloan Digital Sky Survey (2012, methodology): “4 shows the fraction of detected magnetism in white dwarfs as a function of the signal-to-noise (S/N) ratio provided by Kleinman et al. (2013).”
New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12 (2015, methodology): “The mean masses estimated in our DR7 to DR12 sample are smaller than those obtained by Kepler et al. (2015), even with the use of the 3D corrections for the whole sample.”
Circumstellar Debris and Pollution at White Dwarf Stars (2016, methodology): “…the WIRED team opted to cross-correlate the infrared database with each of the two largest available white dwarf catalogs: a preliminary version of the SDSS DR7 (spectroscopic) white dwarf catalog (Kleinman et al., 2013), and the older but historically invaluable catalog of McCook & Sion (1999).”
New white dwarf stars in the Sloan Digital Sky Survey Data Release 10 (2014, methodology): “…high S/N sample, we obtain 〈log gDB〉 = 8.122±0.017. and a corresponding mean mass of 〈MDB〉 = 0.696±0.010M⊙ , similar to the results from gravitational redshift by Falcon et al. (2012) and Bergeron et al. (2011), and to 〈MDB〉 = 0.685 ± 0.013M⊙ for the 191 DBs with S/N> 15 of Kleinman et al. (2013).”
The Hα surface brightness–radius relation: a robust statistical distance indicator for planetary nebulae (2015, methodology): “As another consistency check, the mean mass of an ensemble of DAO WDs (see table 5 of Good et al. 2005) using the Lyman method agrees better than the Balmer method with the canonical WD average mass of 0.60M⊙ (e.g. Tremblay, Bergeron & Gianninas 2011; Kleinman et al. 2013).”
White Dwarf Rotation as a Function of Mass and a Dichotomy of Mode Line Widths: Kepler Observations of 27 Pulsating DA White Dwarfs through K2 Campaign 8 (2017, methodology): “We targeted four new DAVs observed through K2 Campaign 8 based on serendipitous SDSS spectroscopy, which revealed atmospheric parameters within the empirical instability strip (Kleinman et al. 2013).”
Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae (2018, unknown): “11 out canonical atmosphere compositions (Kleinman et al. 2013).”
MESA ISOCHRONES AND STELLAR TRACKS (MIST). I. SOLAR-SCALED MODELS (2016, background): “2 M (Mf ∼ 0.6 M ) is marginally consistent with the peak of the galactic disk WD mass function near ∼ 0.6 M (Liebert et al. 2005; Kleinman et al. 2013; Kepler et al. 2015), although a full model that folds in the age and metallicity distributions as well as the IMF weights will be required for a…”
Magnetic White Dwarfs (2015, background): “3.4 Beyond hydrogen The bulk of all WDs have hydrogen-dominated atmospheres, both in magnitudelimited (Kleinman et al. 2013) and volume-limited samples (Giammichele et al. 2012), and the same is true for MWDs.”