Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..642p&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 94, Aug. 1982, p. 642-646.
Astronomy and Astrophysics
Astronomy
5
Companion Stars, F Stars, G Stars, Hot Stars, Supergiant Stars, Ultraviolet Astronomy, B Stars, Binary Stars, Infrared Photometry, Iue, Stellar Magnitude
Scientific paper
Hot companion stars in two binary systems are analyzed by means of IUE low-dispersion spectra. HR 2859B is found to be a B2 IV or V star, and analysis of ultraviolet to near-infrared photometry indicates the primary to be an early G star only one magnitude brighter in V with a magnitude of -4.0. A third star probably associated with this system was classified B9p Hg a probable visual absolute magnitude of about -1.6 is obtained for it. HR 2786 is now confirmed to have a hot secondary, for which a spectral class of B9-9.5 is obtained. With an assumed luminosity for this component, the G2 Ib primary then has a magnitude of -3.8.
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