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

Xavier Delfosse·Thierry Forveille·Michel Mayor·Christian Perrier·Dominique Naef·Didier Queloz
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Abstract

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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Xavier Delfosse, Thierry Forveille, Michel Mayor, Christian Perrier, Dominique Naef, Didier Queloz. 1998-08-18. The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876. https://arxiv.org/abs/astro-ph/9808026

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