Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jena.confe..13v&link_type=abstract
"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 13-13"
Computer Science
Scientific paper
Asteroseismic studies represent an excellent tool to determine the internal structure of solar-type stars. It also leads to constraints on their external parameters (gravity, effective temperature, metallicity) more precise than obtained from spectroscopy. The determination of the mass and age of the star is also better constrained. I will first present a general discussion on this subject, stressing the special tests which can be used to constrain convective zones, regions of variable chemical composition, etc. Then I will discuss the case of exoplanets-hosts stars. Studying the internal structure of exoplanet-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation and evolution. The observed overmetallicity of stars around which planets have been detected may be a hint in that respect. I will more precisely discuss the asteroseismic studies of three different exoplanets-host stars: μ Arae, observed with the HARPS spectrograph for asteroseismology, which also lead to the detection of a low-mass planet, ι Horologii, which belongs to the Hyades stream in the Galaxy, and HD 52265, which will be observed with the COROT satellite during five consecutive months.
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