The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876

Details The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876 The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876

1998-08-04

arxiv.org/abs/astro-ph/9808026v2

Astronomy and Astrophysics

Astrophysics

4 pages LaTeX, Accepted for publication in A&A Letters. Some sections improved or clarified after referee's comments

Scientific paper

High precision radial velocity observations of the nearby M4 dwarf Gl 876 with the Observatoire de Haute Provence 1.93 m telescope and the new 1.20 m swiss telescope at la Silla indicate the presence of a jovian mass companion to this star. The orbital fit to the data gives a period of 60.8 days, a velocity amplitude of 246 m/s and an eccentricity of 0.34. Assuming that Gl 876 has a mass of 0.3 solar masses, the mass function implies a mass for the companion of 2/sin(i) Jupiter masses.

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