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https://hdl.handle.net/10216/96421| Author(s): | Eric Michel Annie Baglin Michel Auvergne Claude Catala Reza Samadi Frederic 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 Benoit Mosser Arlette Grotsch Noels Eduardo Janot Pacheco Janine Provost Ian W Roxburgh Anne Thoul Thierry Toutain Didier Tiphene Sylvaine Turck Chieze Sylvie D Vauclair Gerard P Vauclair Conny Aerts Georges Alecian Jerome Ballot Stephane Charpinet Anne Marie Hubert Francois Lignieres Philippe Mathias Mario J P F G Monteiro Coralie Neiner Ennio Poretti Jose Renan de Medeiros Ignasi Ribas Michel L Rieutord Teodoro R Roca Cortes Konstanze Zwintz |
| Title: | CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun |
| Issue Date: | 2008 |
| 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. |
| Description: | 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. |
| Subject: | Astrofísica, Ciências Físicas, Astronomia Astrophysics, Physical sciences, Astronomy |
| URI: | https://repositorio-aberto.up.pt/handle/10216/96421 |
| Document Type: | Artigo em Revista Científica Internacional |
| Rights: | restrictedAccess |
| Appears in Collections: | FCUP - Artigo em Revista Científica Internacional |
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|---|---|---|---|---|
| 49419.pdf Restricted Access | 380.93 kB | Adobe PDF | Request a copy from the Author(s) |
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