Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255..232s&link_type=abstract
Astrophysical Journal, Part 1, vol. 255, Apr. 1, 1982, p. 232-239. Research supported by the Ministere de l'Education du Quebec
Astronomy and Astrophysics
Astrophysics
18
Iue, Stellar Atmospheres, Stellar Spectra, Stellar Spectrophotometry, Ultraviolet Spectra, White Dwarf Stars, Atmospheric Composition, Atmospheric Models, Energy Distribution, Line Spectra, Spectrum Analysis, Stellar Models
Scientific paper
A comprehensive analysis of the hot helium-rich white dwarf HD 149499 B is presented based on International Ultraviolet Explorer ultraviolet spectra along with available optical spectra and photometry. Line strengths, line profiles, and continuum fluxes are analyzed in terms of a new grid of hot, high-gravity stellar atmospheres of mixed composition. The line strengths furnish the strongest temperature and gravity diagnostics because they are not affected by the contamination of the white dwarf optical spectrum and photometric properties by the K0 V companion, 2.35 arcsec away. Wegner's (1978) classification of HD 149499 B as a DO star is confirmed.
Guinan Edward F.
Sion Edward M.
Wesemael François
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