An Ideal Testbed for Planet-disk Interaction: Two Giant Protoplanets in Resonance Shaping the PDS 70 Protoplanetary Disk

Abstract

While numerical simulations have been playing a key role in the studies of planet-disk interaction, testing numerical results against observations has been limited so far. With the two directly imaged protoplanets embedded in its circumstellar disk, PDS 70 offers an ideal testbed for planet-disk interaction studies. Using two-dimensional hydrodynamic simulations we show that the observed features can be well explained with the two planets in formation, providing strong evidence that previously proposed theories of planet-disk interaction are in action, including resonant migration, particle trapping, size segregation, and filtration. Our simulations suggest that the two planets are likely in 2:1 mean motion resonance and can remain dynamically stable over million-year timescales. The growth of the planets at $10^{-8}-10^{-7}{M}_{\mathrm{Jup}}{\mathrm{yr}}^{-1}$, rates comparable to the estimates from H$\alpha$ observations, does not destabilize the resonant configuration. Large grains are filtered at the gap edge and only small, (sub-)$\mu$m grains can flow to the circumplanetary disks and the inner circumstellar disk. With the sub-millimeter continuum ring observed outward of the two directly imaged planets, PDS 70 provides the first observational evidence of particle filtration by gap-opening planets. The observed sub-millimeter continuum emission at the vicinity of the planets can be reproduced when (sub-)$\mu$m grains survive over multiple circumplanetary disk gas viscous timescales and accumulate therein. One such possibility is if (sub-)$\mu$m grains grow in size and remain trapped in pressure bumps, similar to what we find happening in circumstellar disks. We discuss potential implications to planet formation in the solar system and mature extrasolar planetary systems.

arXiv commentAccepted for publication in ApJL, 15 pages, 8 figures, An animated version of M_c = 2.5 M_Jup model in Figure 1 is temporarily available at http://jaehanbae.com/movies/pds70/

References in corpus (54)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• A low mass for Mars from Jupiter's early gas-driven migration
• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• A simple model for the evolution of the dust population in protoplanetary disks
• Prevalence of Earth-size planets orbiting Sun-like stars
• Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70
• FARGO: a fast eulerian transport algorithm for differentially rotating disks
• Two accreting protoplanets around the young star PDS 70
• A comparative study of disc-planet interaction
• Ring shaped dust accumulation in transition disks
• Disk Accretion Onto High-Mass Planets
• Dust Filtration by Planet-Induced Gap Edges: Implications for Transitional Disks
• The Star-formation History and Accretion-Disk Fraction Among the K-Type Members of the Scorpius-Centaurus OB Association
• The Disk Substructures at High Angular Resolution Project (DSHARP) VI: Dust trapping in thin-ringed protoplanetary disks
• Mass Flow and Accretion through gaps in Accretion Discs
• Disks ARound TTauri Stars with Sphere (DARTTS-S) I: Sphere / IRDIS Polarimetric Imaging of 8 prominent TTauri Disks
• Reversing type II migration: resonance trapping of a lighter giant protoplanet
• A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296
• Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets
• Kinematic evidence for an embedded protoplanet in a circumstellar disc
• Transitional and Pre-Transitional disks: Gap Opening by Multiple Planets?
• About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of their Intrinsic Architecture
• Formation of planetary systems by pebble accretion and migration: How the radial pebble flux determines a terrestrial-planet or super-Earth growth mode
• Orbital and atmospheric characterization of the planet within the gap of the PDS 70 transition disk
• On the corotation torque in a radiatively inefficient disk
• Planets opening dust gaps in gas disks
• Resolved gas cavities in transitional disks inferred from CO isotopologues with ALMA
• Submillimeter emission associated with candidate protoplanets
• Magellan Adaptive Optics Imaging of PDS 70: Measuring the Mass Accretion Rate of a Young Giant Planet within a Gapped Disk
• Polarimetric Imaging of Large Cavity Structures in the Pre-transitional Protoplanetary Disk around PDS 70: Observations of the disk
• Circumplanetary disc properties obtained from radiation hydrodynamical simulations of gas accretion by protoplanets
• Highly structured disk around the planet host PDS 70 revealed by high-angular resolution observations with ALMA
• Type I planetary migration in a self-gravitating disk
• Treating gravity in thin disk simulations
• Dynamical Constraints on the HR 8799 Planets with GPI
• Do Proto-Jovian Planets Drive Outflows?
• Disk-planets interactions and the diversity of period ratios in Kepler's multi-planetary systems
• Gas and dust hydrodynamical simulations of massive lopsided transition discs - II. Dust concentration
• On the Radio Detectability of Circumplanetary Discs
• NIR Spectroscopy of the HAeBe Star HD 100546: III. Further Evidence of an Orbiting Companion?
• The Structure of Pre-transitional Protoplanetary Disks. II. Azimuthal Asymmetries, Different Radial Distributions of Large and Small Dust Grains in PDS~70
• Evidence for a circumplanetary disk around protoplanet PDS 70 b
• Astrometric Monitoring of the HR 8799 Planets: Orbit Constraints from Self-Consistent Measurements
• The effect of a planet on the dust distribution in a 3D protoplanetary disk
• Dust traps in the protoplanetary disc MWC 758: two vortices produced by two giant planets?
• The Structure of Pre-transitional Protoplanetary Disks I: Radiative Transfer Modeling of the Disk+Cavity in the PDS 70 system
• Probing the Protosolar Disk Using Dust Filtering at Gaps in the Early Solar System
• Differences in the gas and dust distribution in the transitional disk of a sun-like young star, PDS 70
• The accretion of migrating giant planets
• 3D Lagrangian turbulent diffusion of dust grains in a protoplanetary disk: method and first applications
• High-Resolution Near Infrared Spectroscopy of HD 100546: II. Analysis of variable rovibrational CO emission lines
• PDS 70: A transition disk sculpted by a single planet
• High-Resolution Near Infrared Spectroscopy of HD~100546: IV. Orbiting Companion Disappears on Schedule

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• Variable Accretion onto Protoplanet Host Star PDS 70
• Direct imaging of exoplanets: Legacy and prospects
• Near Mean Motion Resonance of Terrestrial Planet Pair Induced by Giant Planet: Application to Kepler-68 System
• Planet formation: key mechanisms and global models