Surface density jumps as planet traps
| dc.creator | Masset, F. | |
| dc.creator | Morbidelli, A. | |
| dc.creator | Crida, A. | |
| dc.creator | Ferreira, J. | |
| dc.date | 2006-01-10 | |
| dc.date.accessioned | 2026-07-07T06:56:56Z | |
| dc.date.available | 2026-07-07T06:56:56Z | |
| dc.description | [Abridged] The tidal torque exerted by a protoplanetary disk with power law surface density and temperature profiles onto an embedded protoplanetary embryo is generally a negative quantity that leads to the embryo inwards migration. Here we investigate how the tidal torque balance is affected at a disk surface density radial jump. The jump has two consequences : - it affects the differential Lindblad torque. In particular if the disk is merely empty on the inner side, the differential Lindblad torque almost amounts to the large negative outer Lindblad torque. - It affects the corotation torque, which is a quantity very sensitive to the local gradient of the disk surface density. In particular if the disk is depleted on the inside and if the jump occurs radially over a few pressure scale-heights, the corotation torque is a positive quantity that is much larger than in a power-law disk. We show by means of customized numerical simulations of low mass planets embedded in protoplanetary nebulae with a surface density jump that the second effect is dominant, that is that the corotation torque largely dominates the differential Lindblad torque on the edge of a central depletion. As a consequence the type I migration of low mass objects reaching the jump should be halted, and all these objects should be trapped there. | |
| dc.description | accepted for publication in ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0601222 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0601222 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/106786 | |
| dc.subject | Astrophysics | |
| dc.title | Surface density jumps as planet traps | |
| dc.type | text |