文章基本信息

标题：Uncovering the planets and stellar activity of CoRoT-7 using only radial velocities
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作者：J. P. Faria ; J. P. Faria ; R. D. Haywood 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2016
卷号：588
页码：1-7
DOI：10.1051/0004-6361/201527899
语种：English
出版社：EDP Sciences
摘要：Stellar activity can induce signals in the radial velocities of stars, complicating the detection of orbiting low-mass planets. We present a method to determine the number of planetary signals present in radial-velocity datasets of active stars, using only radial-velocity observations. Instead of considering separate fits with different number of planets, we use a birth-death Markov chain Monte Carlo algorithm to infer the posterior distribution for the number of planets in a single run. In a natural way, the marginal distributions for the orbital parameters of all planets are also inferred. This method is applied to HARPS data of CoRoT-7. We confidently recover the orbits of both CoRoT-7b and CoRoT-7c although the data show evidence for the presence of additional signals.
关键词：methods: data analysis;planetary systems;stars: individual: CoRoT-7;techniques: radial velocities