A Grid of White Dwarf NLTE Model Atmospheres

Details A Grid of White Dwarf NLTE Model Atmospheres A Grid of White Dwarf NLTE Model Atmospheres

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19312410b&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #124.10; Bulletin of the American Astronomical Society, Vol. 31, p.669

Astronomy and Astrophysics

Astronomy

Scientific paper

We have calculated a grid of White Dwarf NLTE line blanketed model atmospheres using the stellar atmosphere code PHOENIX. The grid covers the temperature range 20,000K to 500,000K and is complete for solar abundance, 10-2 and 10-4 solar abundance. The grid has a temperature resolution of 10,000K in the range of 20,000K to 200,000K and a resolution of 20,000K in the range of 200,000K to 500,000K. The models include a large number of NLTE levels and lines for H, He, C, N and O as well as Si, S, and Fe. The necessity of using self-consistent NLTE line blanketed model atmospheres for the analysis of White Dwarfs is well known. Our new grid makes the most detailed state-of-the-art calculations available for both reevaluating current data and for the study of data yet to be acquired(e.g., by AXAF and FUSE). Our models will be useful, for example, in spectral analysis of hot PG 1159 type stars, determining metal abundances in hot DA and DB White Dwarfs, as well as studying the evolution of novae, and cataclysmic variables.

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