Résumé / Abstract Seminaire_IAP
« Cosmochemical Considerations in the Formation of Earth-Like Planets »

Eric Gaidos
Inst. Astron., Univ. Hawaii (Honolulu, Hawaii, Etats-Unis d'Amérique)

Not all planetary systems are cut from the same cosmic cloth. The photospheres of main sequence stars record significant variation in the abundances of planet-forming elements and there may be other differences too subtle for us yet to observe: Models of galactic chemical evolution and the interstellar medium predict such variation. Observations have already revealed a diversity of planetary masses and dynamics; variation in the composition of planet-forming disks will create profound differences in composition, evolutionary trajectories, and habitability even amongst planets of the same mass and at the same distance from their host star. I will discuss variation in important major and minor elements/isotopes and their potential role in the determining the composition, evolution, and habitability of planets.
vendredi 2 octobre 2009 - 11:00
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage