| Full text | |
| Author(s): Show less - |
Bonomo, A. S.
;
Hebrard, G.
;
Raymond, S. N.
;
Bouchy, F.
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des Etangs, A. Lecavelier
;
Borde, P.
;
Aigrain, S.
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Almenara, J. -M.
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Alonso, R.
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Cabrera, J.
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Csizmadia, Sz.
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Damiani, C.
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Deeg, H. J.
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Deleuil, M.
;
Diaz, R. F.
;
Erikson, A.
;
Fridlund, M.
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Gandolfi, D.
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Guenther, E.
;
Guillot, T.
;
Hatzes, A.
;
Izidoro, A.
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Lovis, C.
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Moutou, C.
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Ollivier, M.
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Paetzold, M.
;
Rauer, H.
;
Rouan, D.
;
Santerne, A.
;
Schneider, J.
Total Authors: 30
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| Document type: | Journal article |
| Source: | Astronomy & Astrophysics; v. 603, JUL 2017. |
| Web of Science Citations: | 5 |
| Abstract | |
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) | |
| FAPESP's process: | 16/19556-7 - Planetary Formation and Dynamics: from the Solar System to Exoplanets |
| Grantee: | André Izidoro Ferreira da Costa |
| Support Opportunities: | Scholarships in Brazil - Young Researchers |
| FAPESP's process: | 16/12686-2 - Planetary formation and dynamics: from the Solar System to exoplanets |
| Grantee: | André Izidoro Ferreira da Costa |
| Support Opportunities: | Research Grants - Young Investigators Grants |