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, Matthew J., Giguere, Jeff A. Valenti, Victor Rodriguez, Carley Chubak, Sebastian Lepine
TL;DR
This paper reports the discovery of a Jovian-mass planet orbiting an M3V star, HIP79431, using Doppler observations, marking a significant addition to the known exoplanets around M dwarfs.
Contribution
First planet discovered from a new survey of 1600 M-to-K dwarf stars, expanding knowledge of giant planets around low-mass stars.
Findings
Planet has Msini of 2.1 Mjup
Orbital period of 111.7 days with eccentricity 0.29
Host star is metal-rich with [Fe/H] = +0.4
Abstract
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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