PARTICLE CONCENTRATION AT PLANET-INDUCED GAP EDGES AND VORTICES. I. INVISCID THREE-DIMENSIONAL HYDRO DISKS

We perform a systematic study of the dynamics of dust particles in protoplanetary disks with embedded planets using global two-dimensional and three-dimensional inviscid hydrodynamic simulations. In the presence of a low-mass planet (8 M[+ in circle]), two narrow gaps start to open in the gas on eac...

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Published inThe Astrophysical journal Vol. 785; no. 2; pp. 122 - 25
Main Authors Zhu, Zhaohuan, Stone, James M., Rafikov, Roman R., Bai, Xue-ning
Format Journal Article
LanguageEnglish
Published United States 20.04.2014
Subjects
ABUNDANCE
ACCRETION DISKS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
AXIAL SYMMETRY
CYLINDRICAL CONFIGURATION
DENSITY
Dust
DUSTS
EXCITATION
Fluid flow
HYDRODYNAMICS
INSTABILITY
LAGRANGIAN FUNCTION
MASS
Planet formation
PLANETS
PROTOPLANETS
PROTOSTARS
SIMULATION
STARS
SURFACES
THREE-DIMENSIONAL CALCULATIONS
Turbulence
Turbulent flow
Vortices
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Summary:We perform a systematic study of the dynamics of dust particles in protoplanetary disks with embedded planets using global two-dimensional and three-dimensional inviscid hydrodynamic simulations. In the presence of a low-mass planet (8 M[+ in circle]), two narrow gaps start to open in the gas on each side of the planet where the density waves are shocked. These shallow gaps can dramatically affect particle drift speed and cause significant, roughly axisymmetric dust depletion. Dust surface density inside the vortex can be increased by more than a factor of 102 in a very non-axisymmetric fashion. Our results imply that in weakly turbulent protoplanetary disk regions (e.g., the "dead zone") dust particles with a very wide range of sizes can be trapped at gap edges and inside vortices induced by planets with M sub(p) < M sub(J), potentially accelerating planetesimal and planet formation there, and giving rise to distinctive features that can be probed by ALMA and the Extended Very Large Array.
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/785/2/122