Other
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998dda....30.0502l&link_type=abstract
American Astronomical Society, DDA meeting #30, #05.02; Bulletin of the American Astronomical Society, Vol. 30, p.1142
Other
Scientific paper
One of the most important astronomical advances in the last decade has been the discovery of planets around other stars. Although such a discovery was expected, the dynamical structure of the systems discovered came as a complete surprise. In order to better understand how such systems formed and what other surprises may be in store, in this paper we present the results of a set of numerical simulations designed to generate plausible giant planet systems from a large number of planetary embryos. This is a bottom-up simulation. Our construction algorithm begins with over 100 planetesimals and evolves them to stable systems. The details of our construction techniques and the dynamical evolution of our synthetic systems are given in the abstract by Lissauer et al. Our simulations produced `stable' (at least for a billion years) systems with a wide range of characteristics. The number of planets ranged from one to seven. Many systems contained only Uranus-mass objects. The masses of largest planet in the systems ranged from 20 to 10(4) M_⊕. We constructed systems that were more compact than our own. We also constructed systems that were much less compact and had planets on very eccentric orbits. Perhaps most surprisingly, we constructed systems that are stable for at least a billion years but yet undergo macroscopic changes in orbits on much shorter timescales.
Duncan Martin J.
Levison Harold F.
Lissauer Jack . J.
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