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Title: SDSS DR7 WHITE DWARF CATALOG

Abstract

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.

Authors:
;  [1]; ; ; ;  [2];  [3];  [4]; ; ;  [5];  [6];  [7];  [8];
  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)
Publication Date:
OSTI Identifier:
22089712
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal, Supplement Series
Additional Journal Information:
Journal Volume: 204; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0067-0049
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; CATALOGS; EMISSION SPECTROSCOPY; LINE BROADENING; LUMINOSITY; MAGNETIC FIELDS; MASS; STARK EFFECT; WHITE DWARF STARS; ZEEMAN EFFECT

Citation Formats

Kleinman, S. J., Nitta, A., Kepler, S. O., Pelisoli, Ingrid, Pecanha, Viviane, Costa, J. E. S., Koester, D., Krzesinski, J., Dufour, P., Lachapelle, F. -R., Bergeron, P., Yip, Ching-Wa, Harris, Hugh C., Eisenstein, Daniel J., Althaus, L., and Corsico, A., E-mail: hch@nofs.navy.mil. SDSS DR7 WHITE DWARF CATALOG. United States: N. p., 2013. Web. doi:10.1088/0067-0049/204/1/5.
Kleinman, S. J., Nitta, A., Kepler, S. O., Pelisoli, Ingrid, Pecanha, Viviane, Costa, J. E. S., Koester, D., Krzesinski, J., Dufour, P., Lachapelle, F. -R., Bergeron, P., Yip, Ching-Wa, Harris, Hugh C., Eisenstein, Daniel J., Althaus, L., & Corsico, A., E-mail: hch@nofs.navy.mil. SDSS DR7 WHITE DWARF CATALOG. United States. https://doi.org/10.1088/0067-0049/204/1/5
Kleinman, S. J., Nitta, A., Kepler, S. O., Pelisoli, Ingrid, Pecanha, Viviane, Costa, J. E. S., Koester, D., Krzesinski, J., Dufour, P., Lachapelle, F. -R., Bergeron, P., Yip, Ching-Wa, Harris, Hugh C., Eisenstein, Daniel J., Althaus, L., and Corsico, A., E-mail: hch@nofs.navy.mil. 2013. "SDSS DR7 WHITE DWARF CATALOG". United States. https://doi.org/10.1088/0067-0049/204/1/5.
@article{osti_22089712,
title = {SDSS DR7 WHITE DWARF CATALOG},
author = {Kleinman, S. J. and Nitta, A. and Kepler, S. O. and Pelisoli, Ingrid and Pecanha, Viviane and Costa, J. E. S. and Koester, D. and Krzesinski, J. and Dufour, P. and Lachapelle, F. -R. and Bergeron, P. and Yip, Ching-Wa and Harris, Hugh C. and Eisenstein, Daniel J. and Althaus, L. and Corsico, A., E-mail: hch@nofs.navy.mil},
abstractNote = {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.},
doi = {10.1088/0067-0049/204/1/5},
url = {https://www.osti.gov/biblio/22089712}, journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 1,
volume = 204,
place = {United States},
year = {Tue Jan 15 00:00:00 EST 2013},
month = {Tue Jan 15 00:00:00 EST 2013}
}