| Texto completo | |
| Autor(es): Mostrar menos - |
Bonomo, A. S.
;
Hebrard, G.
;
Raymond, S. N.
;
Bouchy, F.
;
des Etangs, A. Lecavelier
;
Borde, P.
;
Aigrain, S.
;
Almenara, J. -M.
;
Alonso, R.
;
Cabrera, J.
;
Csizmadia, Sz.
;
Damiani, C.
;
Deeg, H. J.
;
Deleuil, M.
;
Diaz, R. F.
;
Erikson, A.
;
Fridlund, M.
;
Gandolfi, D.
;
Guenther, E.
;
Guillot, T.
;
Hatzes, A.
;
Izidoro, A.
;
Lovis, C.
;
Moutou, C.
;
Ollivier, M.
;
Paetzold, M.
;
Rauer, H.
;
Rouan, D.
;
Santerne, A.
;
Schneider, J.
Número total de Autores: 30
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Astronomy & Astrophysics; v. 603, JUL 2017. |
| Citações Web of Science: | 5 |
| Resumo | |
CoRoT-9b is one of the rare long-period (P = 95 : 3 days) transiting giant planets with a measured mass known to date. We present a new analysis of the CoRoT-9 system based on five years of radial-velocity (RV) monitoring with HARPS and three new space-based transits observed with CoRoT and Spitzer. Combining our new data with already published measurements we redetermine the CoRoT-9 system parameters and find good agreement with the published values. We uncover a higher significance for the small but non-zero eccentricity of CoRoT-9b (e = 0 : 133(-0.037)(+0.042)) and find no evidence for additional planets in the system. We use simulations of planet-planet scattering to show that the eccentricity of CoRoT-9b may have been generated by an instability in which a similar to 50 M-circle plus planet was ejected from the system. This scattering would not have produced a spin-orbit misalignment, so we predict that the CoRoT-9b orbit should lie within a few degrees of the initial plane of the protoplanetary disk. As a consequence, any significant stellar obliquity would indicate that the disk was primordially tilted. (AU) | |
| Processo FAPESP: | 16/19556-7 - Formação e Dinâmica Planetária: do Sistema Solar a Exoplanetas |
| Beneficiário: | André Izidoro Ferreira da Costa |
| Modalidade de apoio: | Bolsas no Brasil - Jovens Pesquisadores |
| Processo FAPESP: | 16/12686-2 - Formação e dinâmica planetária: do Sistema Solar a exoplanetas |
| Beneficiário: | André Izidoro Ferreira da Costa |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |