Orbital migration of interacting low-mass planets in evolutionary radiative turbulent models
arXiv:1202.1868 · doi:10.1088/0004-637X/750/1/34
Abstract
The torques exerted by a locally isothermal disk on an embedded planet lead to rapid inward migration. Recent work has shown that modeling the thermodynamics without the assumption of local isothermality reveals regions where the net torque on an embedded planet is positive, leading to outward migration of the planet. When a region with negative torque lies directly exterior to this, planets in the inner region migrate outwards and planets in the outer region migrate inwards, converging where the torque is zero. We incorporate the torques from an evolving non-isothermal disk into an N-body simulation to examine the behavior of planets or planetary embryos interacting in the convergence zone. We find that mutual interactions do not eject objects from the convergence zone. Small numbers of objects in a laminar disk settle into near resonant orbits that remain stable over the 10 Myr periods that we examine. However, either or both increasing the number of planets or including a correlated, stochastic force to represent turbulence drives orbit crossings and mergers in the convergence zone. These processes can build gas giant cores with masses of order ten Earth masses from sub-Earth mass embryos in 2-3 Myr.
15 pages, 11 figures. Accepted for publication in ApJ
References in corpus (17)
- Direct Imaging of Multiple Planets Orbiting the Star HR 8799
- Optical Images of an Exosolar Planet 25 Light Years from Earth
- Halting Type I planet migration in non-isothermal disks
- On the corotation torque in a radiatively inefficient disk
- Three-dimensional simulations of multiple protoplanets embedded in a protostellar disc
- Formation of Jupiter using opacities based on detailed grain physics
- On corotation torques, horseshoe drag and the possibility of sustained stalled or outward protoplanetary migration
- Dust retention in protoplanetary disks
- On disc protoplanet interactions in a non-barotropic disc with thermal diffusion
- Embryos grown in the dead zone: Assembling the first protoplanetary cores in low mass self-gravitating circumstellar disks of gas and solids
- Accretion of Terrestrial Planets from Oligarchs in a Turbulent Disk
- On the evolution of mean motion resonances through stochastic forcing: Fast and slow libration modes and the origin of HD128311
- 3D MHD Simulations of Planet Migration in Turbulent Stratified Disks
- Formation of planetary cores at Type I migration traps
- Building Giant-Planet Cores at a Planet Trap
- Evolution of inclined planets in three-dimensional radiative discs
- Corotation torques experienced by planets embedded in weakly magnetized turbulent discs
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