| Literature DB >> 18948534 |
Eric Michel1, Annie Baglin, Michel Auvergne, Claude Catala, Reza Samadi, Frédéric Baudin, Thierry Appourchaux, Caroline Barban, Werner W Weiss, Gabrielle Berthomieu, Patrick Boumier, Marc-Antoine Dupret, Rafael A Garcia, Malcolm Fridlund, Rafael Garrido, Marie-Jo Goupil, Hans Kjeldsen, Yveline Lebreton, Benoît Mosser, Arlette Grotsch-Noels, Eduardo Janot-Pacheco, Janine Provost, Ian W Roxburgh, Anne Thoul, Thierry Toutain, Didier Tiphène, Sylvaine Turck-Chieze, Sylvie D Vauclair, Gérard P Vauclair, Conny Aerts, Georges Alecian, Jérôme Ballot, Stéphane Charpinet, Anne-Marie Hubert, François Lignières, Philippe Mathias, Mario J P F G Monteiro, Coralie Neiner, Ennio Poretti, José Renan de Medeiros, Ignasi Ribas, Michel L Rieutord, Teodoro Roca Cortés, Konstanze Zwintz.
Abstract
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.Year: 2008 PMID： 18948534 DOI： 10.1126/science.1163004
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728