SDSS DR7 WHITE DWARF CATALOG

Journal Article · Tue Jan 15 00:00:00 EST 2013 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/204/1/5· OSTI ID:22089712

Kleinman, S. J.; Nitta, A. ^[1]; Kepler, S. O.; Pelisoli, Ingrid; Pecanha, Viviane; Costa, J. E. S. ^[2]; Koester, D. ^[3]; Krzesinski, J. ^[4]; Dufour, P.; Lachapelle, F. -R.; Bergeron, P. ^[5]; Yip, Ching-Wa ^[6]; Harris, Hugh C. ^[7]; Eisenstein, Daniel J. ^[8]; Althaus, L.

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1. Gemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720 (United States)
2. Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil)
3. Institut fuer Theoretische Physik und Astrophysik, Universitaet Kiel, D-24098 Kiel (Germany)
4. Mt. Suhora Observatory, Pedagogical University of Cracow, ul. Podchorazych 2, 30-084 Cracow (Poland)
5. Departement de Physique, Universite de Montreal, C. P. 6128, Succ. Centre-Ville, Montreal, Quebec H3C 3J7 (Canada)
6. Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218 (United States)
7. United States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86001-8521 (United States)
8. Harvard Smithsonian Center for Astrophysics, 60 Garden Street, MS 20, Cambridge, MA 02138 (United States)

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.

• OSTI ID: 22089712
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 204, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
CATALOGS
EMISSION SPECTROSCOPY
LINE BROADENING
LUMINOSITY
MAGNETIC FIELDS
MASS
STARK EFFECT
WHITE DWARF STARS
ZEEMAN EFFECT