Planetary Migration to Large Radii

Details Planetary Migration to Large Radii Planetary Migration to Large Radii

2007-04-25

arxiv.org/abs/0704.3369v1

Mon.Not.Roy.Astron.Soc.378:1589-1600,2007

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11906.x

There is evidence for the existence of massive planets at orbital radii of several hundred AU from their parent stars where the timescale for planet formation by core accretion is longer than the disc lifetime. These planets could have formed close to their star and then migrated outwards. We consider how the transfer of angular momentum by viscous disc interactions from a massive inner planet could cause significant outward migration of a smaller outer planet. We find that it is in principle possible for planets to migrate to large radii. We note, however, a number of effects which may render the process somewhat problematic.

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