SIMBAD references

1998ApJ...505L.147M - Astrophys. J., 505, L147-L149 (1998/October-1)

A planetary companion to a nearby M4 dwarf, Gliese 876.

MARCY G.W., BUTLER R.P., VOGT S.S., FISCHER D. and LISSAUER J.J.

Abstract (from CDS):

Doppler measurements of the M4 dwarf star Gliese 876 taken at both Lick and Keck Observatories reveal periodic, Keplerian velocity variations with a period of 61 days. The orbital fit implies that the companion has a mass of M=2.1 MJUPMsini, an orbital eccentricity of e=0.27±0.03, and a semimajor axis of a=0.21 AU. The planet is the first found around an M dwarf and was drawn from a survey of 24 such stars at Lick Observatory. It is the closest extrasolar planet yet found, providing opportunities for follow-up detection. The presence of a giant planet on a noncircular orbit, 0.2 AU from a 0.32 M star, presents a challenge to planet formation theory. This planet detection around an M dwarf suggests that giant planets are numerous in the Galaxy.

Abstract Copyright:

Journal keyword(s): Stars: Planetary Systems - Stars: Individual: Name: Gliese 876

Simbad objects: 3

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2019.09.16-19:31:34

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