CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun

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) sat...

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Bibliographic Details
Main Author: Eric Michel (author)
Other Authors: Annie Baglin (author), Michel Auvergne (author), Claude Catala (author), Reza Samadi (author), Frederic Baudin (author), Thierry Appourchaux (author), Caroline Barban (author), Werner W Weiss (author), Gabrielle Berthomieu (author), Patrick Boumier (author), Marc Antoine Dupret (author), Rafael A Garcia (author), Malcolm Fridlund (author), Rafael Garrido (author), Marie Jo Goupil (author), Hans Kjeldsen (author), Yveline Lebreton (author), Benoit Mosser (author), Arlette Grotsch Noels (author), Eduardo Janot Pacheco (author), Janine Provost (author), Ian W Roxburgh (author), Anne Thoul (author), Thierry Toutain (author), Didier Tiphene (author), Sylvaine Turck Chieze (author), Sylvie D Vauclair (author), Gerard P Vauclair (author), Conny Aerts (author), Georges Alecian (author), Jerome Ballot (author), Stephane Charpinet (author), Anne Marie Hubert (author), Francois Lignieres (author), Philippe Mathias (author), Mario J P F G Monteiro (author), Coralie Neiner (author), Ennio Poretti (author), Jose Renan de Medeiros (author), Ignasi Ribas (author), Michel L Rieutord (author), Teodoro R Roca Cortes (author), Konstanze Zwintz (author)
Format: article
Language:eng
Published: 2008
Subjects:
Astrofísica, Ciências Físicas, Astronomia
Astrophysics, Physical sciences, Astronomy
Online Access:https://repositorio-aberto.up.pt/handle/10216/96421
Country:Portugal
Oai:oai:repositorio-aberto.up.pt:10216/96421
Description
Summary: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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