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Catalogue POP – Notice individuelle de publication

Michel Eric, Baglin Annie, Auvergne Michel, Catala Claude, Samadi Davoud-Reza, Baudin Frederic, Appourchaux Thierry, Barban Caroline, Weiss Werner W., Berthomieu Gabrielle, Boumier P., Dupret Marc-Antoine, Garcia Rafael A., Fridlund Malcolm C., Garrido Rafael, Goupil Marie-José, Kjeldsen Hans, Lebreton Yveline, Mosser Benoît, Grotsch-Noels Arlette, Janot-Pacheco Eduardo, Provost Janine, Roxburgh Ian W., Thoul Anne, Toutain Thierry, Tiphene Didier, Turck-Chieze Sylvaine, Vauclair Sylvie D., Vauclair Gérard, Aerts Conny, Alecian Georges, Ballot Jérôme, Charpinet Stéphane, Hubert Anne-Marie, Lignières François, Mathias Philippe, Monteiro M. J. P. F. G., Neiner Coralie, Poretti Ennio, Renan de Medeiros José, Ribas Ignasi, Rieutord Michel, Cortes Teodoro Roca, Zwintz Konstanze

CoRoT Measures Solar-Like Oscillations and Granulation in Stars Hotter Than the Sun

Science, 2008, vol. 322, pp. 558-

Référence DOI : 10.1126/science.1163004
Référence ADS : 2008Sci...322..558M

Résumé :

Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measured oscillations and the stellar granulation signature in three main sequence stars that are noticeably hotter than the sun. The oscillation amplitudes are about 1.5 times as large as those in the Sun; the stellar granulation is up to three times as high. The stellar amplitudes are about 25% below the theoretic values, providing a measurement of the nonadiabaticity of the process ruling the oscillations in the outer layers of the stars.

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