Giant planet formation models: the case of HD69830

Details Giant planet formation models: the case of HD69830 Giant planet formation models: the case of HD69830

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..371a&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present formation models of the three Neptune mass planet system around HD69830. We first show that the formation of this system is very unlikely in the framework of the disk instability model. We then derive formation models based on the extended core-accretion model, taking into account migration as well as disk evolution. We show that the two outermost planets have started their formation process at large distances from the central star, and have therefore accreted a lot of icy planetesimals. We finally calculate the thermodynamical conditions inside these two planets, and show that water is likely to exist there under the form of a super-critical fluid.

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