Photospheres of hot stars. II - an analysis of Zeta Puppis

Details Photospheres of hot stars. II - an analysis of Zeta Puppis Photospheres of hot stars. II - an analysis of Zeta Puppis

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..728b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 15, 1986, p. 728-735.

Astronomy and Astrophysics

Astrophysics

59

Hot Stars, Photosphere, Spectrum Analysis, Stellar Evolution, Stellar Spectrophotometry, Charge Coupled Devices, Electromagnetic Scattering, Line Spectra, Stellar Atmospheres, Stellar Models, Stellar Temperature, Stellar Winds

Scientific paper

High signal-to-noise ratio line profiles of ζ Puppis (O4f) obtained with a CCD camera are compared with theoretical model atmospheres that include radiation scattered back from the stellar wind onto the photosphere, an effect referred to as wind blanketing. The best-fit wind-blanketed model for the observed mass loss rate of 5×10-6M_sun;yr-1 yields the following properties of ζ Puppis: Teffective = 42,000±1500K, log g = 3.5±0.1, helium abundance by number, [Y] = 0.17±0.03. If one assumes a distance modulus of 8.2±0.4 mag, ζ Puppis has a bolometric magnitude of -10.1±0.4, a radius of 18±4 R_sun;, and current mass of 36 (+21, -15) M_sun;.

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