A Bayesian Kepler Periodogram detects a second planet in HD 208487
| dc.creator | Gregory, P. C. | |
| dc.date | 2006-09-08 | |
| dc.date | 2006-11-02 | |
| dc.date.accessioned | 2026-07-07T10:23:35Z | |
| dc.date.available | 2026-07-07T10:23:35Z | |
| dc.description | An automatic Bayesian Kepler periodogram has been developed for identifying and characterizing multiple planetary orbits in precision radial velocity data. The periodogram is powered by a parallel tempering MCMC algorithm which is capable of efficiently exploring a multi-planet model parameter space. The periodogram employs an alternative method for converting the time of an observation to true anomaly that enables it to handle much larger data sets without a significant increase in computation time. Improvements in the periodogram and further tests using data from HD 208487 have resulted in the detection of a second planet with a period of $909_{-92}^{82}$d, an eccentricity of $0.37_{-0.20}^{0.26}$, a semi-major axis of $1.87_{-0.14}^{0.13}$ AU and an $M \sin i = 0.45_{-0.11}^{0.13}$ M$_{\rm J}$. The revised parameters of the first planet are period $= 129.8\pm 0.4$d, eccentricity $= 0.20\pm 0.09$, semi-major axis $= 0.51\pm0.02$ AU and $M \sin i = 0.41\pm0.05$ M$_{\rm J}$. Particular attention is paid to several methods for calculating the model marginal likelihood which is used to compare the probabilities of models with different numbers of planets. | |
| dc.description | An extended version of the paper with 3 more figures, one extra table, and typos corrected | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0609229 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0609229 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.374:1321-1333,2007 | |
| dc.identifier | doi:10.1111/j.1365-2966.2006.11240.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175880 | |
| dc.subject | Astrophysics | |
| dc.title | A Bayesian Kepler Periodogram detects a second planet in HD 208487 | |
| dc.type | text |