Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-17
Astronomy and Astrophysics
Astrophysics
To appear in: "The CoRoT Book", (Eds) F. Favata, A. Baglin & J. Lochard, ESA Publications Division, ESA SP
Scientific paper
Studying the internal structure of exoplanets-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation. The observed overmetallicity of stars with planets may be a hint in that respect. Although it is obviously related to the physical processes which occur during the early phases of planetary formation, the origin of this overmetallicity is unclear. It may be either primordial or related to accretion processes or both. In this framework, asteroseismic studies represent an excellent tool to determine the structural differences between stars with and without detected planets. The two different missions of COROT are linked in this programme: the detection of new planets and the seismic studies of their host stars share the same goal of a better understanding of planetary formation and evolution. The COROT main target HD52265, which is known to host at least one giant planet, will be observed continuously during five months: many interesting results are expected from this long run. Meanwhile, stellar oscillations will be searched for in all stars around which new planets will be discovered.
Bazot Michael
Bouchy Francois
Castro Matthieu
Charpinet Stephane
Laymand Marion
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