Planet Formation In Highly Inclined Binary Systems I. Planetesimals Jump Inwards And Pile Up

Details Planet Formation In Highly Inclined Binary Systems I. Planetesimals Jump Inwards And Pile Up Planet Formation In Highly Inclined Binary Systems I. Planetesimals Jump Inwards And Pile Up

2011-04-08

arxiv.org/abs/1104.1475v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

26 pages, 13 figures, submitted to ApJ, Comments welcome

Scientific paper

Most detected planet-bearing binaries are in wide orbits, for which a high inclination, $i_B$, between the binary orbital plane and the plane of the planetary disk around the primary is likely to be common. In this paper, we investigate the intermediate stages - from planetesimals to planetary embryos/cores - of planet formation in such highly inclined cases. Our focus is on the effects of gas drag on the planetesimals' orbital evolution, in particular on the evolution of the planetesimals' semimajor axis distribution and their mutual relative velocities. We first demonstrate that a non-evolving axisymmetric disk model is a good approximation for studying the effects of gas drag on a planetesimal in the highly inclined case ($30^\circ

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