SIMBAD references

2009ApJ...694..183F - Astrophys. J., 694, 183-191 (2009/March-3)

Protostellar cloud fragmentation and inward migration by disk capture as the origin of massive exoplanets.


Abstract (from CDS):

A new model for the formation of Jovian planets is proposed. We consider planets forming at large distances from a protostar (≳100 AU) through direct fragmentation of a gas cloud, by the same formation mechanism as wide stellar and brown dwarf binaries. We model the gravitational evolution of a system of these distant planets and a second population formed in a disk closer to the star. We compute the typical closest approach of these planets to the star (i.e., smallest pericenter) over the course of their evolution. When the planets reach a pericenter within a gaseous disk surrounding the star, dynamical friction from this disk slows down the planet at each plunge, causing its orbit to be gradually circularized and made coplanar with the disk. After the disk dissipates, a large fraction of these planets may be left at orbits small enough to be detected in present radial velocity surveys. A brief analytic derivation of the rate of orbital energy dissipation during these disk crossings is presented. Observational tests of this model are discussed.

Abstract Copyright:

Journal keyword(s): methods: N-body simulations - planetary systems - planetary systems: formation

Simbad objects: 4

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2009ApJ...694..183F and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact