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arxiv: 1001.1174 · v1 · pith:EMNBIDV6new · submitted 2010-01-07 · 🌌 astro-ph.EP

M2K: I. A Jovian mass planet around the M3V star HIP79431

Kevin Apps , Kelsey I. Clubb , Debra A. Fischer , Eric Gaidos , Andrew W. Howard , John A. Johnson , Geoffrey W. Marcy , Howard Isaacson
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Matthew J. Giguere Jeff A. Valenti Victor Rodriguez Carley Chubak Sebastian Lepine
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keywords planetstararounddopplerdwarfhip79431orbitaldays
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Doppler observations from Keck Observatory reveal the presence of a planet with Msini of 2.1 Mjup orbiting the M3V star HIP79431. This is the sixth giant planet to be detected in Doppler surveys of M dwarfs and it is one of the most massive planets discovered around an M dwarf star. The planet has an orbital period of 111.7 days and an orbital eccentricity of 0.29. The host star is metal rich, with an estimated [Fe/H] = +0.4. This is the first planet to emerge from our new survey of 1600 M-to-K dwarf stars.

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