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Título

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

Autor Michel, Eric; Baglin, Annie; Auvergne, Michel; Catala, Claude; Samadi, Reza; Baudin, Frédéric; Appourchaux, Thierry; Barban, Caroline; Weiss, Werner W.; Berthomieu, Gabrielle; Boumier, Patrick; Dupret, Marc-Antoine; García, Rafael A.; Fridlund, Malcolm; Garrido, Rafael ; Goupil, Marie-Jose; Kjeldsen, Hans; Lebreton, Yveline; Mosser, Benoît; Grotsch-Noels, Arlette; Janot-Pacheco, Eduardo; Provost, Janine; Roxburgh, Ian W.; Thoul, Anne; Toutain, Thierry; Tiphène, Didier; Turck-Chieze, Sylvaine; Vauclair, Sylvie D.; Vauclair, Gérard P.; Aerts, Conny; Alecian, Georges; Ballot, Jérôme; Charpinet, Stéphane; Hubert, Anne-Marie; Lignières, François; Mathias, Philippe; Monteiro, Mario; Neiner, Coralie; Poretti, Ennio; Medeiros, José Renan de; Ribas, Ignasi ; Rieutord, Michel L.; Roca Cortés, Teodoro; Zwintz, Konstanze
Palabras clave Solar-Like Oscillations
Stellar granulation
Stars hotter than the sun
CoRoT (Convection Rotation and Planetary Transits) satellite
Asteroseismology
Astrophysics
Fecha de publicación 24-oct-2008
EditorAmerican Association for the Advancement of Science
Citación Science 322(5901): 558-560 (2008)
ResumenOscillations 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.
Descripción 4 pages, 3 figures.-- Supporting Online Material: Text, Fig. S1, Table S1 and References, available at: http://www.sciencemag.org/cgi/content/full/322/5901/558/DC1
Versión del editorhttp://dx.doi.org/10.1126/science.1163004
URI http://hdl.handle.net/10261/7982
DOI10.1126/science.1163004
ISSN0036-8075 (Print)
1095-9203 (Online)
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