Astronomy and Astrophysics – Astronomy
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..812f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, May 1985, p. 812-816. NASA-supported research.
Astronomy and Astrophysics
Astronomy
23
Chromosphere, Companion Stars, Late Stars, Stellar Spectra, Subdwarf Stars, White Dwarf Stars, Barium, H Alpha Line, Iue, Lyman Alpha Radiation, Main Sequence Stars, Mass Transfer, Stellar Spectrophotometry, Ultraviolet Spectra
Scientific paper
Short-wavelength ultraviolet spectra of two active-chromosphere giants, HD 160538 and HD 185510, show hot stellar continua and Lα absorption features. The hot companion of HD 160538 is a white dwarf whose ultraviolet spectrum is matched best to the energy distribution of a Teff = 30000K and log g = 8 model atmosphere. The ultraviolet spectrum of HD 185510 shows numerous absorption features and is identified as a B subdwarf. Since the giant star of each of these binary systems has no known abundance anomalies, these systems appear to be consistent with the mass-transfer scenario of barium-star formation.
Fekel F. X.
Simon Theodore
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