Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sf2a.conf..313c&link_type=abstract
SF2A-2009: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, held 29 June - 4 July 2009 in
Astronomy and Astrophysics
Astrophysics
Scientific paper
The Minimum Mass Solar Nebula (MMSN) is a protoplanetary disk that contains the minimum amount of solids necessary to build the planets of the Solar System at the desired location. Assuming that the giant planets formed in the compact configuration they have at the beginning of the ``Nice model'' (Tsiganis et al, 2005; Gomes et al, 2005), Desch (2007) built a new MMSN, about ten times denser than the standard MMSN by Hayashi (1981).
However, a planet in a protoplanetary disk migrates. With numerical simulations, we show that the four giant planets of the solar system could not survive in Desch's dense disk. In contrast, in a low density disk, planetary migration smoothly brings the planets closer to each other; then planet-planet interactions may stop migration, in a configuration compatible with the ``Nice model'' (Crida, 2009).
In fact, planetary migration makes the concept of MMSN irrelevant: planet formation is not a local process. Migration and radial drift of solids should be taken into account when reconstructing the proto-solar nebula.
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