Model of the atmosphere of the bright component of the binary system Upsilon SGR

Details Model of the atmosphere of the bright component of the binary system Upsilon SGR Model of the atmosphere of the bright component of the binary system Upsilon SGR

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....22..121l&link_type=abstract

(Astrofizika, vol. 22, Jan.-Feb. 1985, p. 121-135) Astrophysics (ISSN 0571-7132), vol. 21, no. 1, July 1985, p. 74-84. Translati

Astronomy and Astrophysics

Astrophysics

17

Binary Stars, Peculiar Stars, Stellar Atmospheres, Stellar Composition, Stellar Models, Stellar Spectra, Abundance, Continuous Spectra, Line Spectra, Spectral Energy Distribution, Spectrum Analysis, Stellar Temperature, Ultraviolet Spectra

Scientific paper

A set of model atmospheres for the bright component of the system υ Sgr has been computed with 10000° ≤ Te ≤ 14000° and 1.0 ≤ log g ≤ 4.0. The chemical composition for the models was obtained from analysis of spectra. The helium abundance was taken in the ranges 0.70 - 0.95, hydrogen 0.01 - 10-6 and heavy elements 0.05 - 0.30 by number of atoms. The theoretical continuum and the character of the models have been compared with the observed spectrum. The atmosphere of υ Sgr is in agreement with the models: Te = 13500°±200°, log g = 1.5±0.25, and Te = 14000°±200°, log g = 2.0±0.25.

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