Protoplanetary migration in turbulent isothermal disks
arXiv:0912.0964 · doi:10.1088/0004-637X/709/2/759
Abstract
In order to reproduce the statistical properties of the observed exoplanets, population synthesis models have shown that the migration of protoplanets should be significantly slowed down, and that processes stalling migration should be at work. Much current theoretical efforts have thus been dedicated to find physical effects that slow down, halt or even reverse migration. Many of these studies rely on the horseshoe drag, whose long term-evolution (saturated or not) is intimately related to the disk viscosity in laminar disk models. We investigate how the horseshoe drag exerted on a low-mass planet is altered by a more realistic treatment of the turbulence in protoplanetary disks. Two-dimensional hydrodynamic simulations are performed with a turbulence model that reproduces the main turbulence properties of three-dimensional magnetohydrodynamic calculations. We find that the horseshoe drag can remain unsaturated on the long term, depending on the turbulence strength. We show that the desaturation of the horseshoe drag by turbulence can be modeled by vortensity diffusion across the time-averaged planet's horseshoe region. At low-turbulence, the running-time averaged torque is in good agreement with the total torque obtained for an equivalent laminar model, with a similar vortensity's diffusion coefficient. At high-turbulence, differences arise due to the time-evolution of the averaged density profile with turbulence.
16 pages, 12 figures, accepted for publication in ApJ
References in corpus (24)
- A torque formula for non-isothermal Type I planetary migration - I. Unsaturated horseshoe drag
- A comparative study of disc-planet interaction
- Toward a Deterministic Model of Planetary Formation V. Accumulation Near the Ice Line
- Halting Type I planet migration in non-isothermal disks
- Grain Retention and Formation of Planetesimals near the Snow Line in MRI-driven Turbulent Protoplanetary Disks
- On the corotation torque in a radiatively inefficient disk
- MHD simulations of the magnetorotational instability in a shearing box with zero net flux. I. The issue of convergence
- Dust settling in local simulations of turbulent protoplanetary disks
- On corotation torques, horseshoe drag and the possibility of sustained stalled or outward protoplanetary migration
- Type I planetary migration in a self-gravitating disk
- Dust sedimentation and self-sustained Kelvin-Helmholtz turbulence in protoplanetary disk mid-planes. I. Radially symmetric simulations
- On disc protoplanet interactions in a non-barotropic disc with thermal diffusion
- Global MHD simulations of stratified and turbulent protoplanetary discs. II. Dust settling
- Accretion of Terrestrial Planets from Oligarchs in a Turbulent Disk
- Growing and moving low-mass planets in non-isothermal disks
- Turbulent Torques on Protoplanets in a Dead Zone
- Diffusive Migration of Low-Mass Proto-planets in Turbulent Disks
- On the evolution of mean motion resonances through stochastic forcing: Fast and slow libration modes and the origin of HD128311
- On the horseshoe drag of a low-mass planet. II Migration in adiabatic disks
- Turbulent transport and its effect on the dead zone in protoplanetary discs
- On the width and shape of the corotation region for low-mass planets
- Building Giant-Planet Cores at a Planet Trap
- On the horseshoe drag of a low-mass planet. I - Migration in isothermal disks
- The effect of planetary migration on the corotation resonance
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- Planet-disk interaction and orbital evolution
- A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion
- Formation and Evolution of Compact Object Binaries in AGN Disks
- Breaking the Chains: Hot Super-Earth systems from migration and disruption of compact resonant chains
- Toward a Deterministic Model of Planetary Formation VI: Dynamical Interaction and Coagulation of Multiple Rocky Embryos and Super-Earth Systems around Solar Type Stars
- Bifurcation of planetary building blocks during Solar System formation
- Orbital Migration of Interacting Stellar Mass Black Holes in Disks around Supermassive Black Holes
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- Mass-gap Mergers in Active Galactic Nuclei
- Binaries migrating in a gaseous disk: Where are the Galactic center binaries?
- Spin Evolution of Stellar-mass Black Hole Binaries in Active Galactic Nuclei
- Saturated torque formula for planetary migration in viscous disks with thermal diffusion: recipe for protoplanet population synthesis
- Orbital Migration of Interacting Stellar Mass Black Holes in Disks around Supermassive Black Holes II. Spins and Incoming Objects
- Understanding how planets become massive. I. Description and validation of a new toy model
- 3D MHD Simulations of Planet Migration in Turbulent Stratified Disks
- On the dynamics of planetesimals embedded in turbulent protoplanetary discs
- Orbital migration of interacting low-mass planets in evolutionary radiative turbulent models
- Planet Formation in Circumbinary Configurations: Turbulence Inhibits Planetesimal Accretion
- Type I planet migration in weakly magnetised laminar discs
- On the dynamics of planetesimals embedded in turbulent protoplanetary discs with dead zones
- Planet migration: self-gravitating radiation hydrodynamical models of protoplanets with surfaces
- Corotation torques experienced by planets embedded in weakly magnetized turbulent discs
- Recent developments in planet migration theory
- Evolution of Retrograde Orbiters in an AGN Disk
- The Fate of Planetesimals in Turbulent Disks with Dead Zones. I. The Turbulent Stirring Recipe
- Understanding the assembly of Kepler's compact planetary systems
- Migration and Growth of Protoplanetary Embryos I: Convergence of Embryos in Protoplanetary Disks
- Hydrodynamical turbulence in eccentric circumbinary discs and its impact on the in situ formation of circumbinary planets
- Chaotic Type I Migration in Turbulent Discs
- Considerations on the accretion of Uranus and Neptune by mutual collisions of planetary embryos in the vicinity of Jupiter and Saturn
- Spin Evolution of Stellar-mass Black Holes Embedded in AGN disks: Orbital Eccentricity Produces Retrograde Circumstellar Flows
- Making giant planet cores: convergent migration and growth of planetary embryos in non-isothermal discs
- Chaotic Gas Accretion by Black Holes Embedded in AGN Discs as Cause of Low-spin Signatures in Gravitational Wave Events
- On the dynamics of resonant super-Earths in disks with turbulence driven by stochastic forcing
- Spirals in protoplanetary disks from photon travel time
- Prograde and Retrograde Gas Flow around Disk-embedded Companions: Dependence on Eccentricity, Mass and Disk Properties
- Promoted Mass Growth of Multiple, Distant Giant Planets through Pebble Accretion and Planet-Planet Collision
- Breaking mean-motion resonances during Type I planet migration
- Protoplanetary migration in non-isothermal discs with turbulence driven by stochastic forcing
- Wide Dust Gaps in Protoplanetary Disks Induced by Eccentric Planets: A Mass-Eccentricity Degeneracy
- Effects of global gas flows on type I migration
- The implications of stochastic gas torques for asymmetric binaries in the LISA band
- Application of recent results on the orbital migration of low mass planets: convergence zones
- Dust-void evolution driven by turbulent dust flux can induce runaway migration of Earth-mass planets
- Linear bending wave propagation in laminar and turbulent discs
- Turbulence destroys thermal lobes around Mars-sized planetary embryos