The spectroscopic orbits of HD 44780 and 65 Geminorum

Details The spectroscopic orbits of HD 44780 and 65 Geminorum The spectroscopic orbits of HD 44780 and 65 Geminorum

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jrasc..80...91g&link_type=abstract

Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 80, April 1986, p. 91-108.

Astronomy and Astrophysics

Astronomy

14

Astronomical Spectroscopy, Binary Stars, Giant Stars, Late Stars, Lunar Occultation, Periodic Variations, Radial Velocity, Stellar Motions

Scientific paper

Binary star systems in which both components are normal late-type giants are rare. HD 44780 and 65 Gem are shown to be such systems; they have periods of 577 and 1601 days respectively, and their spectra are conspicuously double-lined for considerable parts of their orbits. Their mass ratios are very close to unity, although their luminosity ratios are not. Attention is drawn to the imminent series of lunar occultations of 65 Gem.

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