SIMBAD references

2005ApJ...634..625R - Astrophys. J., 634, 625-640 (2005/November-3)

A ∼7.5 M planet orbiting the nearby star, GJ 876.

RIVERA E.J., LISSAUER J.J., BUTLER R.P., MARCY G.W., VOGT S.S., FISCHER D.A., BROWN T.M., LAUGHLIN G. and HENRY G.W.

Abstract (from CDS):

High-precision, high-cadence radial velocity monitoring over the past 8 yr at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The residuals of three-body Newtonian fits, which include GJ 876 and Jupiter-mass companions b and c, show significant power at a periodicity of 1.9379 days. Self-consistently fitting the radial velocity data with a model that includes an additional body with this period significantly improves the quality of the fit. These four-body (three-planet) Newtonian fits find that the minimum mass of companion ``d'' is msini=5.89±0.54 Mand that its orbital period is 1.93776 (±7x10–5) days. Assuming coplanar orbits, an inclination of the GJ 876 planetary system to the plane of the sky of ∼50° gives the best fit. This inclination yields a mass for companion d of m=7.53±0.70 M, making it by far the lowest mass companion yet found around a main-sequence star other than our Sun. Precise photometric observations at Fairborn Observatory confirm low-level brightness variability in GJ 876 and provide the first explicit determination of the star's 96.7 day rotation period. Even higher precision short-term photometric measurements obtained at Las Campanas imply that planet d does not transit GJ 876.

Abstract Copyright:

Journal keyword(s): Stars: Planetary Systems - Planets and Satellites: General - Stars: Individual: Alphanumeric: GJ 876

VizieR on-line data: <Available at CDS (J/ApJ/634/625): table1.dat table5.dat>

CDS comments: In title, new planet is GJ 876d. Parag. 5 : PSR B1247+1221 incorrect for PSR 1257+12

Simbad objects: 9

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2019.09.19-19:39:59

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