Type I Planet Migration in Nearly Laminar Disks
| dc.creator | Li, H. | |
| dc.creator | Lubow, S. H. | |
| dc.creator | Li, S. | |
| dc.creator | Lin, D. N. C. | |
| dc.date | 2008-12-02 | |
| dc.date.accessioned | 2026-07-07T12:16:08Z | |
| dc.date.available | 2026-07-07T12:16:08Z | |
| dc.description | We describe 2D hydrodynamic simulations of the migration of low-mass planets ($\leq 30 M_{\oplus}$) in nearly laminar disks (viscosity parameter $α< 10^{-3}$) over timescales of several thousand orbit periods. We consider disk masses of 1, 2, and 5 times the minimum mass solar nebula, disk thickness parameters of $H/r = 0.035$ and 0.05, and a variety of $α$ values and planet masses. Disk self-gravity is fully included. Previous analytic work has suggested that Type I planet migration can be halted in disks of sufficiently low turbulent viscosity, for $α\sim 10^{-4}$. The halting is due to a feedback effect of breaking density waves that results in a slight mass redistribution and consequently an increased outward torque contribution. The simulations confirm the existence of a critical mass ($M_{cr} \sim 10 M_{\oplus}$) beyond which migration halts in nearly laminar disks. For $α\ga 10^{-3}$, density feedback effects are washed out and Type I migration persists. The critical masses are in good agreement with the analytic model of Rafikov (2002). In addition, for $α\la 10^{-4}$ steep density gradients produce a vortex instability, resulting in a small time-varying eccentricity in the planet's orbit and a slight outward migration. Migration in nearly laminar disks may be sufficiently slow to reconcile the timescales of migration theory with those of giant planet formation in the core accretion model. | |
| dc.description | 3 figures, accepted to ApJL | |
| dc.identifier | https://arxiv.org/abs/0812.0586 | |
| dc.identifier | http://arxiv.org/abs/0812.0586 | |
| dc.identifier | Astrophys.J.Lett.690:L52-L55,2009 | |
| dc.identifier | doi:10.1088/0004-637X/690/1/L52 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/211707 | |
| dc.subject | Astrophysics | |
| dc.title | Type I Planet Migration in Nearly Laminar Disks | |
| dc.type | text |