DZ stars in SDSS DR4 Virtual Observatory Resource

Authors

1. Dufour P.
2. Bergeron P.
3. Liebert J.
4. Harris H.C.
5. Knapp G.R.
6. Anderson S.F.,Hall P.B.
7. Strauss M.A.
8. Collinge M.J.
9. Edwards M.C.

Published by

CDS

Abstract

We present a detailed analysis of a large spectroscopic and photometric sample of DZ white dwarfs based on our latest model atmosphere calculations. We revise the atmospheric parameters of the trigonometric parallax sample of Bergeron, Leggett, & Ruiz (2001, Cat. <J/ApJS/133/413>, 12 stars) and analyze 147 new DZ white dwarfs discovered in the SDSS. The inclusion of metals and hydrogen in our model atmosphere calculations leads to different atmospheric parameters than those derived from pure helium models.

Keywords

1. white-dwarf-stars
2. effective-temperature
3. chemical-abundances

Bibliographic source Bibcode

2007ApJ...663.1291D

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ivo://CDS.VizieR/J/ApJ/663/1291

Document Object Identifer DOI

doi:10.26093/cds/vizier.16631291

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