SIMBAD references

2004ApJ...617L..57G - Astrophys. J., 617, L57-L60 (2004/December-2)

Discovery of a cool, massive, and metal-rich DAZ white dwarf.

GIANNINAS A., DUFOUR P. and BERGERON P.

Abstract (from CDS):

We report the discovery of a new metal-rich DAZ white dwarf, GD 362. High signal-to-noise ratio optical spectroscopy reveals the presence of spectral lines from hydrogen as well as Ca I, Ca II, Mg I, and Fe I. A detailed model atmosphere analysis of this star yields an effective temperature of Teff=9740±50 K, a surface gravity of logg=9.12±0.07, and photospheric abundances of logCa/H=-5.2±0.1, logMg/H=-4.8±0.1, and logFe/H=-4.5±0.1. White dwarf cooling models are used to derive a mass of 1.24 M☉for GD 362, making it the most massive and metal-rich DAZ star uncovered to date. The problems related to the presence of such large metal abundances in a nearby (d∼25 pc) white dwarf in terms of an accretion scenario are briefly discussed.

Abstract Copyright: ∼

Journal keyword(s): Stars: Abundances - Stars: Individual: Alphanumeric: GD 362 - Stars: White Dwarfs

Simbad objects: 4

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2004ApJ...617L..57G and select 'bookmark this link' or equivalent in the popup menu