| HAL : hal-00391861, version 1 |
| arXiv : 0812.1267 |
| Code Bibliographique ADS : 2008Sci...322..558M |
| DOI : 10.1126/SCIENCE.1163004 |
| Fiche détaillée | Récupérer au format |
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| Science 322 (2008) 558- |
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| CoRoT Measures Solar-Like Oscillations and Granulation in Stars Hotter Than the Sun |
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| Eric Michel 1Annie Baglin 1 |
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| (10/2008) |
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| 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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| 1 : | Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) |
| CNRS : UMR8109 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot | |
| 2 : | Laboratoire Astrophysique de Toulouse-Tarbes (LATT) |
| CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III | |
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| Domaine | : | Planète et Univers/Astrophysique/Astrophysique galactique |
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| Lien vers le texte intégral : |
| hal-00391861, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00391861 | |
| oai:hal.archives-ouvertes.fr:hal-00391861 | |
| Contributeur : Dominique Lullier | |
| Soumis le : Vendredi 5 Juin 2009, 10:06:02 | |
| Dernière modification le : Vendredi 5 Juin 2009, 10:06:02 | |