Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..203b&link_type=abstract
SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret
Astronomy and Astrophysics
Astrophysics
Scientific paper
The study of solar oscillations or helioseismology has demonstrated the power of this tool to test the physical conditions in stellar interiors. Solar oscillations are excited by turbulent convection near the surface. Similar oscillations might then expected in stars with an external convective envelope. The detection of such oscillations in distant stars requires very high precision and stable instruments due to the very low level signal, typically from few cm/s to few m/s, in radial velocity measurements with periods ranging from a few minutes up to a couple of hours.
Thanks to recent great progress in instrumentation, such oscillations have now been detected clearly in several stars on the main sequence or close to it.
There have also been tentative claims of detection of such oscillations in a couple of red giants.
We present here new results obtained for two red giant stars during a 2-month bi-site campaign using the CORALIE and ELODIE spectrographs.
Aerts Christine
Barban Caroline
Bouchy Florent
Carrier Fabien
de Ridder Joris
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