From: LARRY KLAES (ljk4_at_msn.com)
Date: Sat Jul 01 2006 - 16:36:59 PDT
From: Daniel Eisenstein [view email]
Date: Wed, 28 Jun 2006 22:19:43 GMT (581kb)
A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital
Sky Survey Data Release 4
Authors: Daniel J. Eisenstein, James Liebert, Hugh C. Harris, S.J.
Kleinmann, Atsuko Nitta, Nicole Silvestri, Scott A. Anderson, J.C.
Barentine, Howard J. Brewington, J. Brinkmann, Michael Harvanek, Jurek
Krzesinski, Eric H. Neilsen Jr., Dan Long, Donald P. Schneider, Stephanie A.
Comments: Accepted by the Astrophysical Journal Supplements, 25 pages, 24
figures, LaTeX. The electronic catalog, as well as diagnostic figures and
links to the spectra, is available at this http URL
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.
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