A deeper view of the CoRoT-9 planetary system A small non-zero eccentricity for CoRoT-9b likely generated by planet-planet scattering
Artikel i vetenskaplig tidskrift, 2017

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.

techniques: photometric

planetary systems

Spin-Orbit Misalignments

Terrestrial Planets

stars: individual: CoRoT-9

Warm

Dynamical Instabilities

Jupiters

Hot Jupiters

Harps-N

Sophie Velocimetry

Gas Giant Planets

Super-Earths

techniques: radial velocities

Earth-Like Planets

Författare

A. S. Bonomo

Istituto Nazionale Di Astrofisica, Rome

G. Hebrard

Observatoire de Haute-Provence

Universite Paris Sorbonne - Paris IV

S. N. Raymond

Laboratoire d'Astrophysique de Bordeaux

F. Bouchy

Universite de Geneve

A. L. des Etangs

Universite Paris Sorbonne - Paris IV

P. Borde

Laboratoire d'Astrophysique de Bordeaux

S. Aigrain

University of Oxford

J. M. Almenara

Universite de Geneve

R. Alonso

Instituto Astrofisico de Canarias

Universidad de la Laguna

J. Cabrera

Deutsches Zentrum fur Luft- Und Raumfahrt

S. Csizmadia

Deutsches Zentrum fur Luft- Und Raumfahrt

C. Damiani

Universite Paris-Sud XI

H. J. Deeg

Instituto Astrofisico de Canarias

Universidad de la Laguna

M. Deleuil

Laboratoire d'Astrophysique de Marseille

R. F. Diaz

Instituto de Astronomia y Fisica del Espacio

Universidad de Buenos Aires

A. Erikson

Deutsches Zentrum fur Luft- Und Raumfahrt

Malcolm Fridlund

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

D. Gandolfi

Universita degli Studi di Torino

E. W. Guenther

Thüringer Landessternwarte

T. Guillot

Observatoire de la Cote d'Azur

A. Hatzes

Thüringer Landessternwarte

A. Izidoro

UNESP-Universidade Estadual Paulista

Laboratoire d'Astrophysique de Bordeaux

C. Lovis

Universite de Geneve

C. Moutou

Canada France Hawaii Telescope Corporation

Laboratoire d'Astrophysique de Marseille

M. Ollivier

LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique

Universite Paris-Sud XI

M. Patzold

Universitat zu Koln

H. Rauer

Deutsches Zentrum fur Luft- Und Raumfahrt

Technische Universitat Berlin

D. Rouan

LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique

A. Santerne

Laboratoire d'Astrophysique de Marseille

J. Schneider

Universite Paris 7- Denis Diderot

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 603 A43-

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201730624