Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.1113b&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 106, no. 3, p. 1113-1117.
Astronomy and Astrophysics
Astronomy
16
Binary Stars, Companion Stars, F Stars, White Dwarf Stars, Iue, Spectral Energy Distribution, Star Clusters, Stellar Envelopes, Stellar Mass, Stellar Orbits, Stellar Temperature
Scientific paper
We observed with IUE a white dwarf (WD) companion to the Hyades F6 V binary stars HD 27483. This system is known to be a close binary of two nearly equal stars with an orbital period of 3.05 days. Our IUE observations revealed the presence of a third star, a white dwarf with an effective temperature of 23,000 +/- 1000 K and a mass of approximately 0.6 solar mass. Its presence in the Hyades cluster with a known age permits me to derive the mass of its progenitor, which must have been about 2.3 solar masses. The presence of the white dwarf in a binary system opens the possibility that some of the envelope material, which was expelled by the WD progenitor, may have been collected by the F6 stars. We may thus be able to study abundance anomalies of the WD progenitor with known mass on the surface of the F6 companions.
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