Abstract
Recent developments in non-ideal magnetohydrodynamic simulations of protoplanetary disks suggest that instead of being traditional turbulent (viscous) accretion disks, they have a largely laminar flow with accretion driven by large-scale wind torques. These disks are possibly threaded by Hall-effect generated large-scale horizontal magnetic fields. We have examined the dynamics of the corotation region of a low mass planet embedded in such a disk and the evolution of the associated migration torque. These disks lack strong turbulence and associated turbulent diffusion, and the presence of a magnetic field and radial gas flow presents a situation outside the applicability of previous corotation torque theory. We summarize the analytical analysis of the corotation torque, give details on the numerical methods used, and in particular the relative merits of different numerical schemes for the inviscid problem.
Highlights
Protoplanetary disks, the formation sites of solar systems, are comprised of a very low ionization gas and a mixture of dust, boulders, and protoplanets
Recent developments in non-ideal magnetohydrodynamic simulations of protoplanetary disks suggest that instead of being traditional turbulent accretion disks, they have a largely laminar flow with accretion driven by large-scale wind torques
We have examined the dynamics of the corotation region of a low mass planet embedded in such a disk and the evolution of the associated migration torque. These disks lack strong turbulence and associated turbulent diffusion, and the presence of a magnetic field and radial gas flow presents a situation outside the applicability of previous corotation torque theory
Summary
- THE MIGRATION OF GAP-OPENING PLANETS IS NOT LOCKED TO VISCOUS DISK EVOLUTION Paul C. - OUTWARD MIGRATION IN EVOLUTIONARY MODELS Wladimir Lyra, Sijme-Jan Paardekooper and Mordecai-Mark Mac Low. This content was downloaded from IP address 130.225.212.4 on 23/01/2019 at 11:00
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