A Bayesian Analysis of Extrasolar Planet Data for HD 73526 | Zendy

P. C. Gregory | Zendy

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A Bayesian Analysis of Extrasolar Planet Data for HD 73526

Author(s) -

P. C. Gregory

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/432594

Subject(s) - physics , exoplanet , orbit (dynamics) , markov chain monte carlo , radial velocity , eccentricity (behavior) , bayesian probability , planet , astrophysics , monte carlo method , orbital period , stars , astronomy , algorithm , statistics , mathematics , law , political science , engineering , aerospace engineering

A new Bayesian tool for nonlinear model tting has been developed, that employs a parallel tempering Markov Chain Monte Carlo algorithm with a novel statistical control system. The algorithm has been used to re-analyze precision radial velocity data for HD 73526. For a single planet model, three possible orbits were found with periods of 127:88+0:37 0:09, 190:4 +1:8 2:1 and 376:2 +1:4 4:3 days. The 128 day orbit, with an eccentricity of 0:56 0:03, has a maximum value of prior likelihood which is 16 times larger than for the next highest solution at 376 days. However, the 376 day orbit, with an eccentricity of 0:10+0:05

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