Protoplanet Magnetosphere Interactions

Details Protoplanet Magnetosphere Interactions Protoplanet Magnetosphere Interactions

2007-01-11

arxiv.org/abs/astro-ph/0701342v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A

Scientific paper

In this paper, we study a simple model of an orbiting protoplanet in a central magnetospheric cavity, the entry into such a cavity having been proposed as a mechanism for halting inward orbital migration. We have calculated the gravitational interaction of the protoplanet with the magnetosphere using a local model and determined the rate of evolution of the orbit. The interaction is found to be determined by the outward flux of MHD waves and thus the possibility of the existence of such waves in the cavity is significant. The estimated orbital evolution rates due to gravitational and other interactions with the magnetosphere are unlikely to be significant during protoplanetary disk lifetimes.

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