The unseen companion of HD114762 - A probable brown dwarf

Details The unseen companion of HD114762 - A probable brown dwarf The unseen companion of HD114762 - A probable brown dwarf

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.339...38l&link_type=abstract

Nature (ISSN 0028-0836), vol. 339, May 4, 1989, p. 38-40. Research supported by the Smithsonian Institution, U.S.-Israel Binatio

Computer Science

205

Brown Dwarf Stars, Companion Stars, Stellar Orbits, Extrasolar Planets, Orbital Mechanics, Stellar Mass

Scientific paper

Spectroscopic evidence for a probable brown dwarf companion to the solar-type star HD114762 is presented. This star undergoes periodic variations in radial velocity which is attributed here to orbital motion resulting from the presence of an unseen companion. The rather short period of 84 days places the companion in an orbit similar to that of Mercury around the sun, whereas the rather low velocity amplitude of about 0.6 km/s implies that the mass of the companion may be as low as 0.011 solar mass, or 11 Jupiter masses. This leads to the suggestion that the companion is probably a brown dwarf, and may even be a giant planet. However, because the inclination of the orbit to the line of sight is unknown, the mass of the companion may be considerably larger than this lower limit.

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