HD 160538 and HD 185510 : two active-chromosphere stars with hot companions.
Abstract
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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- May 1985
- DOI:
- Bibcode:
- 1985AJ.....90..812F
- Keywords:
-
- 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;
- Astrophysics