The Architecture of the GJ 876 Planetary System

Details The Architecture of the GJ 876 Planetary System The Architecture of the GJ 876 Planetary System

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21335107b&link_type=abstract

American Astronomical Society, AAS Meeting #213, #351.07; Bulletin of the American Astronomical Society, Vol. 41, p.492

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We present the findings from a reanalysis of previously published high-precision radial velocities and astrometry for the GJ 876 planetary system using a self-consistent model that accounts for the planet-planet interactions. This study resolves the discrepancy between the previous results for the inclination of the system, and thus the planet masses, obtained from analyses of the data sets separately. Furthermore, our investigation has yielded a tight constraint on the mutual inclination of the two outer planets' orbits. This result constitutes one of the first measurements of the degree of coplanarity in an exoplanet system, and demonstrates how such determinations may be achieved for others using data obtained from existing facilities.

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