Photospheres of hot stars. III - Luminosity effects at spectral type 09.5

Details Photospheres of hot stars. III - Luminosity effects at spectral type 09.5 Photospheres of hot stars. III - Luminosity effects at spectral type 09.5

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340.1073v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 15, 1989, p. 1073-1090.

Astronomy and Astrophysics

Astrophysics

102

Hot Stars, O Stars, Photosphere, Stellar Luminosity, Stellar Spectra, Absorption Spectra, Abundance, Line Spectra, Stellar Atmospheres, Stellar Winds

Scientific paper

Hydrogen and helium line profiles with high signal-to-noise ratios were obtained for four stars of spectral type 09.5 (Alpha Cam, Xi Ori A, Delta Ori A,AE Aur) that form a sequence in luminosity: Ia, Ib, II, V. The basic stellar parameters of these stars are determined by fitting the observed line profiles of weak photospheric absorption lines with profiles from models which include the effect of radiation scattered back onto the photosphere from their stellar winds, an effect referred to as wind blanketing. For these stars, the inclusion of wind blanketing is significant only for the most luminous star, Alpha Cam, for which the effective temperature was shifted about -2000 K relative to an unblanketed model.

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