A catalog of spectroscopically confirmed white dwarfs from the sloan digital sky survey data release 4

Daniel J. Eisenstein, James Liebert, Hugh C. Harris, S. J. Kleinman, Atsuko Nitta, Nicole Silvestri, Scott A. Anderson, J. C. Barentine, Howard J. Brewington, J. Brinkmann, Michael Harvanek, Jurek Krzesiński, Eric H. Neilsen, Dan Long, Donald P. Schneider, Stephanie A. Snedden

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Abstract

We present a catalog of 9316 spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey Data Release 4. We have selected the stars through photometric cuts and spectroscopic modeling, backed up by a set of visual inspections. About 6000 of the stars are new discoveries, roughly doubling the number of spectroscopically confirmed white dwarfs. We analyze the stars by performing temperature and surface gravity fits to grids of pure hydrogen and helium atmospheres. Among the rare outliers are a set of presumed helium-core DA white dwarfs with estimated masses below 0.3 M, including two candidates that may be the lowest-mass yet found. We also present a list of 928 hot subdwarfs.

Original languageEnglish (US)
Pages (from-to)40-58
Number of pages19
JournalAstrophysical Journal, Supplement Series
Volume167
Issue number1
DOIs
StatePublished - Nov 1 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Eisenstein, D. J., Liebert, J., Harris, H. C., Kleinman, S. J., Nitta, A., Silvestri, N., Anderson, S. A., Barentine, J. C., Brewington, H. J., Brinkmann, J., Harvanek, M., Krzesiński, J., Neilsen, E. H., Long, D., Schneider, D. P., & Snedden, S. A. (2006). A catalog of spectroscopically confirmed white dwarfs from the sloan digital sky survey data release 4. Astrophysical Journal, Supplement Series, 167(1), 40-58. https://doi.org/10.1086/507110