Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..288b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 1, 1985, p. 288-293.
Astronomy and Astrophysics
Astrophysics
23
Barium, Companion Stars, Metallic Stars, Stellar Spectra, White Dwarf Stars, Binary Stars, Iue, Radii, Spectral Energy Distribution, Stellar Mass, Stellar Temperature, Ultraviolet Spectra
Scientific paper
In the present paper, the observation of a white dwarf companion of the mild Ba star Xi-1 Ceti (= 65 Ceti = HR 649 = HD 13611) is reported, taking into account also the properties of the mild Ba star and of its companion. The UV spectrum of Xi-1 Ceti is discussed along with an interpretation of this spectrum. Attention is given to the effective temperature of the companion, the absorption bands in the spectrum, the radius and mass of the Xi-1 Ceti companion, and questions regarding the obscuration of the companion by the atmosphere of the Ba star. It is found that the overall energy distribution of the Xi-1 Ceti companion can best be matched with a 14,000 K DA white dwarf of log g = 8 or less. However, the absolute intensity is too small and would require a radius too small and a mass too large for such a gravity.
Böhm-Vitense Erika
Johnson Hollis R.
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