Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stin...9621300a&link_type=abstract
Conference Paper, Presented at the 181st Meeting of the American Astronomical Society System Systems Div.
Astronomy and Astrophysics
Astronomy
Red Giant Stars, Binary Stars, S Stars, Stellar Spectra, Ultraviolet Astronomy, A Stars, Peculiar Stars, Ultraviolet Spectra, Iue, Mass Transfer, Main Sequence Stars, H Alpha Line, Spectral Energy Distribution
Scientific paper
IUE low dispersion observations were made of the Tc-deficient peculiar red giant (PRG) star, HDE 332077, to test the hypothesis that Tc-poor PRG's are formed as a result of mass transfer from a binary companion rather than from internal thermal pulsing while on the asymptotic red giant branch. Previous ground-based observations of this star indicated that it is a binary, but the secondary star was too massive for an expected white dwarf. A deep, short wavelength prime (SWP) exposure was needed to search for evidence of an A-type main-sequence companion. We obtained a 120 minute LWP exposure (LWP 23479), followed by a collaborative 1230 minute SWP exposure (SWP 45113). These observations were combined with our earlier IUE and optical data on this PRG star to model the spectral energy distribution of the system.
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