HD 160538 and HD 185510: Two active-chromosphere stars with hot companions

Journal Article · Wed May 01 04:00:00 EDT 1985 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113790· OSTI ID:5760873

Fekel, F C; Simon, T

Short-wavelength ultraviolet spectra of two active-chromosphere giants, HD 160538 and HD 185510, show hot stellar continua and L..cap alpha.. absorption features. The hot companion of HD 160538 is a white dwarf whose ultraviolet spectrum is matched best to the energy distribution of a T/sub eff/ = 30 000 K 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.

• Research Organization: Dyer Observatory, Vanderbilt University, Nashville, Tennessee 37235
• OSTI ID: 5760873
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 90:5; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METALS
BARIUM
BINARY STARS
CHEMICAL COMPOSITION
DWARF STARS
ELEMENTS
ENERGY SPECTRA
MASS TRANSFER
METALS
ORIGIN
SPECTRA
STARS
ULTRAVIOLET SPECTRA
WHITE DWARF STARS