Constructing the secular architecture of the solar system. I. The giant planets

Details Constructing the secular architecture of the solar system. I. The giant planets Constructing the secular architecture of the solar system. I. The giant planets

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...507.1041m&link_type=abstract

Astronomy and Astrophysics, Volume 507, Issue 2, 2009, pp.1041-1052

Astronomy and Astrophysics

Astrophysics

20

Planets And Satellites: Formation, Solar System: Formation

Scientific paper

Using numerical simulations, we show that smooth migration of the giant planets through a planetesimal disk leads to an orbital architecture that is inconsistent with the current one: the resulting eccentricities and inclinations of their orbits are too low. The crossing of mutual mean motion resonances by the planets would excite their orbital eccentricities but not their orbital inclinations. Moreover, the amplitudes of the eigenmodes characterising the current secular evolution of the eccentricities of Jupiter and Saturn would not be reproduced correctly, and only one eigenmode is excited by resonance-crossing. We show that, at the very least, encounters between Saturn and one of the ice giants (Uranus or Neptune) need to have occurred to reproduce the current secular properties of the giant planets, in particular the amplitude of the two strongest eigenmodes in the eccentricities of Jupiter and Saturn.

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