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

Jupiters

Warm

Super-Earths

Hot Jupiters

Earth-Like Planets

stars: individual: CoRoT-9

Terrestrial Planets

Gas Giant Planets

Sophie Velocimetry

Dynamical Instabilities

Harps-N

planetary systems

techniques: radial velocities

Spin-Orbit Misalignments

Författare

A. S. Bonomo

Istituto Nazionale Di Astrofisica, Rome

G. Hebrard

Observatoire de Haute-Provence

Sorbonne Université

S. N. Raymond

Laboratoire d'Astrophysique de Bordeaux

F. Bouchy

Universite de Geneve

A. L. des Etangs

Sorbonne Université

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 Zentrums für Luft- und Raumfahrt (DLR)

S. Csizmadia

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

C. Damiani

Université Paris-Sud

H. J. Deeg

Instituto Astrofisico de Canarias

Universidad de la Laguna

M. Deleuil

Laboratoire d'Astrophysique de Marseille

R. F. Diaz

Universidad de Buenos Aires

Instituto de Astronomia y Fisica del Espacio

A. Erikson

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Malcolm Fridlund

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

D. Gandolfi

Universita degli Studi di Torino

E. W. Guenther

Thüringer Landessternwarte Tautenburg

T. Guillot

Observatoire de la Cote d'Azur

A. Hatzes

Thüringer Landessternwarte Tautenburg

A. Izidoro

Laboratoire d'Astrophysique de Bordeaux

UNESP-Universidade Estadual Paulista

C. Lovis

Universite de Geneve

C. Moutou

Laboratoire d'Astrophysique de Marseille

Canada France Hawaii Telescope Corporation

M. Ollivier

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

Université Paris-Sud

M. Patzold

Universität zu Köln

H. Rauer

Technische Universität Berlin

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

D. Rouan

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

A. Santerne

Laboratoire d'Astrophysique de Marseille

J. Schneider

Université Paris Diderot

Astronomy and Astrophysics

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

Vol. 603 A43-

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201730624