Theoretical UBVRI colors of iron core white dwarfs

Details Theoretical UBVRI colors of iron core white dwarfs Theoretical UBVRI colors of iron core white dwarfs

2003-08-11

arxiv.org/abs/astro-ph/0308184v2

Astron.Astrophys.412:837-848,2003

Astronomy and Astrophysics

Astrophysics

13 pages, 12 figures, Astronomy & Astrophysics (2003) in print

Scientific paper

10.1051/0004-6361:20031307

We explore photometric properties of hypothetical iron core white dwarfs and compute their expected colors in UBVRI Johnson broadband system. Atmospheres of iron core WDs in this paper consist of pure iron covered by a pure hydrogen layer of an arbitrary column mass. LTE model atmospheres and theoretical spectra are calculated on the basis of Los Alamos TOPS opacities and the equation of state from the OPAL project, suitable for nonideal Fe and H gases. We have also computed UBVRI colors of the models and determined an area on the B-V vs. U-B and U-B vs. V-I planes, occupied by both pure Fe, and pure H model atmospheres of WD stars. Finally, we search for iron core white dwarf candidates in the available literature.

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