SIMBAD references

2005ApJ...631.1198G - Astrophys. J., 631, 1198-1214 (2005/October-1)

A Bayesian analysis of extrasolar planet data for HD 73526.


Abstract (from CDS):

A new Bayesian tool for nonlinear model fitting 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 reanalyze 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+1.4–4.3days. The 128 day orbit, with an eccentricity of 0.56±0.03, has a maximum value of priorxlikelihood that is 16 times larger than for the next highest solution at 376 days. However, the 376 day orbit, with an eccentricity of 0.10+0.05–0.10, is formally more probable because for this sparse data set there is a much larger volume of parameter space with a significant probability density in the vicinity of the 376 day peak. The previously reported orbit (Tinney et al. 2003) of 190.5±3.0 days corresponds to our least probable orbit. The analysis highlights the need for measurements around phase 0.5 for the 376 day period.

Abstract Copyright:

Journal keyword(s): Methods: Data Analysis - Stars: Planetary Systems - Stars: Individual: Henry Draper Number: HD 73526

Simbad objects: 9

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