SDSS DR7 White Dwarf Catalog

Authors
Kleinman, S. J.; Kepler, S. O.; Koester, D.; Pelisoli, Ingrid; Pecanha, Viviane; Nitta, A.; Costa, J. E. S.; Krzesinski, J.; Dufour, P.; Lachapelle, F. R.; Bergeron, P.; Yip, Ching Wa; Harris, Hugh C.; Eisenstein, Daniel J.; Althaus, Leandro Gabriel; Corsico, Alejandro Hugo
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
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.
Fil: Kleinman, S. J. . Gemini Observatory; Estados Unidos
Fil: Kepler, S. O. . Universidade Federal do Rio Grande do Sul; Brasil
Fil: Koester, D.. Universitat Kiel. Institut fur Theoretische Physik und Astrophysik; Alemania
Fil: Pelisoli, Ingrid . Universidade Federal do Rio Grande do Sul; Brasil
Fil: Pecanha, Viviane . Universidade Federal do Rio Grande do Sul; Brasil
Fil: Nitta, A.. Gemini Observatory; Estados Unidos
Fil: Costa, J. E. S. . Universidade Federal do Rio Grande do Sul; Brasil
Fil: Krzesinski, J.. Pedagogical University of Cracow. Mt. Suhora Observatory.; Polonia
Fil: Dufour, P.. University Of Montreal; Canadá
Fil: Lachapelle, F. R. . University Of Montreal; Canadá
Fil: Bergeron, P.. University Of Montreal; Canadá
Fil: Yip, Ching Wa. University Johns Hopkins; Estados Unidos
Fil: Harris, Hugh C.. United States Naval Observatory; Estados Unidos
Fil: Eisenstein, Daniel J.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Fil: Corsico, Alejandro Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Subject
Catalogs
Mass function
White dwarfs
Magnetic fields
Luminosity function
Stars
Astronomía
Ciencias Físicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/8485