Poster Abstracts - Kepler - NASA

POSTER ABSTRACTSP0802. POSTER SESSION IISolar type pulsators on and near the Main Sequence E. Michel 1 , 1 Observatoire de Paris, LESIA, pl. J. Janssen,F92195 Meudon, France, Eric.Michel@obspm.fr.Introduction: Since acoustic oscillations havebeen observed in the Sun and their excitation mechanismunderstood, it has been clear that such oscillationshad to be present in a noticeably large domain ofmass and age covering low-mass stars to intermediateones and all the Main Sequence evolution phase atleast. The great success of helioseismology thus haslogically motivated a great interest for extending thistechnique to such stars. While first detections havebeen achieved from the ground, first precise measurementsof the modes in terms of eigenfrequencies, amplitudesand lifetimes, came only recently with spacephotometry observations. After more than four years inorbit, CoRoT has observed and measured oscillationsin about a dozen of such stars, most of them on theMain Sequence, from early F stars to objects veryclose to our Sun in terms of effective temperature andevolution stage. This sample is being enlarged by newCoRoT observations and by the Kepler data.I will discuss these results and show to which extentthey satisfy the expectation of the community interms of precision on the determination of the oscillationmodes parameters. I will also use this sample todiscuss what we already learned from them in terms ofstellar physics and beyond, for instance in the case ofstars hosting planets.1962011 Kepler Science Conference - NASA Ames Research Center