Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-06-28
Astrophys.J.Suppl.167:40-58,2006
Astronomy and Astrophysics
Astrophysics
Accepted by the Astrophysical Journal Supplements, 25 pages, 24 figures, LaTeX. The electronic catalog, as well as diagnostic
Scientific paper
10.1086/507110
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. Roughly 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 Msun, including two candidates that may be the lowest masses yet found. We also present a list of 928 hot subdwarfs.
Anderson Scott A.
Barentine John C.
Brewington Howard J.
Brinkmann John
Eisenstein Daniel J.
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