Uncovering the planets and stellar activity of CoRoT-7 using only radial velocities

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Faria, JP (Autor) Outra; Haywood, RD (Autor) Outra; Brewer, BJ (Autor) Outra; Figueira, P (Autor) Outra; Oshagh, M (Autor) Outra; Santerne, A (Autor) Outra; N.C. Santos (Autor) FCUP

Revista

Título: Astronomy and Astrophysics

Vol. 588

Página Final: A31

ISSN: 0004-6361

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 59 Citações

Scopus - 65 Citações

Outras Informações

ID Authenticus: P-00K-B81

DOI: 10.1051/0004-6361/201527899

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7