Physics
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sf2a.conf..607d&link_type=abstract
SF2A-2002: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 24-29, 2002, Eds.: F. Combes and D. Barret,
Physics
Scientific paper
In the last ten years several tens of giant exoplanets have been discovered around stars of very variable compositions. The inner structure of these planets is still unknown. Here, we look for a general relationship between mass and radius, for known Earth like planets of the solar system, and investigate how this relationship may be affected by the relative abundance of elements such as Mg, Si, Fe, and S in the nebula where the planet accreted. Assuming that the relative amount of the latter elements is similar to that in the star around which the planet orbits. The equation of state of mineral physics are used to derive the radius of a planet from its observed mass. A first step has been to check the model against the Solar system. A good agreement is found not only for the determination of the mass, but also for the pressure and gravity profiles provided by standard Earth's models.
Dubois Véronique
Mocquet Antoine
Sotin Ch.
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