Circumplanetary disk ices. I. Ice formation vs. viscous evolution and grain drift

Abstract

The large icy moons of Jupiter formed in a circumplanetary disk (CPD). CPDs are fed by infalling circumstellar gas and dust which may be shock-heated upon accretion or sublimated while passing through an optically thin gap. Accreted material is then either incorporated into moons, falls into the planet, or is lost beyond the disk edge on relatively short timescales. If ices are sublimated during accretion onto the CPD we know there must be sufficient time for them to recondense or moons such as Ganymede or Callisto could not form. The chemical timescale to form sufficiently icy solids places a novel constraint on the dynamical behaviour and properties of CPDs. We use the radiation thermochemical code ProDiMo to analyze how the radial ice abundance evolves in CPDs. We consider different initial chemical conditions of the disk to explore the consequences of infalling material being inherited from the circumstellar disk or being reset to atomic conditions by shock-heating. We contrast the timescales of ice formation with those of viscous evolution and radial dust drift. Water ice can form very efficiently in the CPD from initially atomic conditions, as a significant fraction is efficiently re-deposited on dust grains within < 1 yr. Radial grain drift timescales are in general longer than those of ice formation on grains. Icy grains of size $a<3$ mm retain their icy mantles while crossing an optically thin circumstellar disk gap at 5 au for $L_{\ast }<10$ L${}_{\odot }$. Three-body reactions play an important role in water formation in the dense midplane condition of CPDs. The CPD midplane must be depleted in dust relative to the circumstellar disk by a factor 10-50 to produce solids with the ice to rock ratio of the icy Galilean satellites. The CPD snowline is not erased by radial grain drift, which is consistent with the compositional gradient of the Galilean satellites being primordial.

arXiv comment20 pages, 17 figures

References in corpus (85)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The UMIST database for astrochemistry 2012
• A simple model for the evolution of the dust population in protoplanetary disks
• Formation of methyl formate and other organic species in the warm-up phase of hot molecular cores
• Structure of Stationary Photodissociation Fronts
• Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70
• Accretion Disks around Young Objects. I. The Detailed Vertical Structure
• Formation rates of complex organics in UV irradiated CH3OH-rich ices I: Experiments
• On the Luminosity of Young Jupiters
• Two accreting protoplanets around the young star PDS 70
• The Birth Environment of the Solar System
• Disk Accretion Onto High-Mass Planets
• Enhanced Angular Momentum Transport in Accretion Disks
• Dust Filtration by Planet-Induced Gap Edges: Implications for Transitional Disks
• Radiation thermo-chemical models of protoplanetary disks I. Hydrostatic disk structure and inner rim
• Breaking the Chains: Hot Super-Earth systems from migration and disruption of compact resonant chains
• Mass Flow and Accretion through gaps in Accretion Discs
• Consistent dust and gas models for protoplanetary disks. I. Disk shape, dust settling, opacities, and PAHs
• Spectral and Photometric Diagnostics of Giant Planet Formation Scenarios
• ALMA Survey of Lupus Protoplanetary Disks II: Gas Disk Radii
• A PDR-Code Comparison Study
• Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets
• Gas and grain chemical composition in cold cores as predicted by the Nautilus 3-phase model
• Benchmark problems for continuum radiative transfer. High optical depths, anisotropic scattering, and polarisation
• Distribution of Accreting Gas and Angular Momentum onto Circumplanetary Disks
• Molecular hydrogen formation in the interstellar medium
• Accretion of Jupiter-mass Planets in the Limit of Vanishing Viscosity
• Meridional flows in the disk around a young star
• Nested-grid calculations of disk-planet interaction
• N-body simulations of planetary accretion around M dwarf stars
• Accreting Circumplanetary Disks: Observational Signatures
• The thermal structure and the location of the snow line in the protosolar nebula: axisymmetric models with full 3-D radiative transfer
• Magellan Adaptive Optics Imaging of PDS 70: Measuring the Mass Accretion Rate of a Young Giant Planet within a Gapped Disk
• Circumplanetary disc properties obtained from radiation hydrodynamical simulations of gas accretion by protoplanets
• Origin of the Different Architectures of the Jovian and Saturnian Satellite Systems
• Mass constraint for a planet in a protoplanetary disk from the gap width
• Meridional circulation of gas into gaps opened by giant planets in three-dimensional low-viscosity disks
• Circumplanetary disk or circumplanetary envelope?
• A highly settled disk around Oph 163131
• Tidal Truncation of Circumplanetary Discs
• Radiation thermo-chemical models of protoplanetary disks II. Line diagnostics
• Global hydromagnetic simulations of a planet embedded in a dead zone: gap opening, gas accretion and formation of a protoplanetary jet
• Jupiter's composition suggests its core assembled exterior to the N2 snowline
• Disk evolution, element abundances and cloud properties of young gas giant planets
• On the Terminal Rotation Rates of Giant Planets
• Do Proto-Jovian Planets Drive Outflows?
• Short dissipation times of proto-planetary discs - an artifact of selection effects?
• Early evolution of the birth cluster of the solar system
• Angular Momentum Accretion onto a Gas Giant Planet
• On the Radio Detectability of Circumplanetary Discs
• Formation of Giant Planet Satellites
• The Effects of Molecular Anions on the Chemistry of Dark Clouds
• Consistent dust and gas models for protoplanetary disks: II. Chemical networks and rates
• Explaining millimeter-sized particles in brown dwarf disks
• Protoplanetary Disks as (Possibly) Viscous Disks
• Evidence for a circumplanetary disk around protoplanet PDS 70 b
• Theoretical Model of Hydrogen Line Emission from Accreting Gas Giants
• Hubble Space Telescope UV and H$\alpha$ Measurements of the Accretion Excess Emission from the Young Giant Planet PDS 70 b
• Chemical evolution of protoplanetary disks - the effects of viscous accretion, turbulent mixing and disk winds
• Effects of the Planetary Temperature on the Circumplanetary Disk and on the Gap
• On the Viability of the Magnetorotational Instability in Circumplanetary Disks
• Thermodynamics of Giant Planet Formation: Shocking Hot Surfaces on Circumplanetary Disks
• Magnetospheric Accretion as a Source of H$\alpha$ Emission from Proto-planets around PDS 70
• Jupiter formed as a pebble pile around the N${}_2$ ice line
• Formation of moon systems around giant planets: Capture and ablation of planetesimals as foundation for a pebble accretion scenario
• The Galilean Satellites Formed Slowly from Pebbles
• Meridional Circulation of Dust and Gas in the Circumstellar Disk: Delivery of Solids onto the Circumplanetary Region
• Hydrogenation of PAH cations: a first step towards H2 formation
• The Formation of Solar System Analogs in Young Star Clusters
• Photoevaporation as a Truncation Mechanism for Circumplanetary Disks
• Pebble accretion at the origin of water in Europa
• On the structure and mass delivery towards circumplanetary discs
• A Hot Gap Around Jupiter's Orbit in the Solar Nebula
• Dust evolution and satellitesimal formation in circumplanetary disks
• Modeling the Jovian subnebula: II - Composition of regular satellites ices
• Evaporation of grain-surface species by shock waves in proto-planetary disk
• CH abundance gradient in TMC-1
• Building the Galilean moons system via pebble accretion and migration: A primordial resonant chain
• Circum-planetary discs as bottlenecks for gas accretion onto giant planets
• Satellitesimal Formation via Collisional Dust Growth in Steady Circumplanetary Disks
• Long-term evolution of the Galilean satellites: the capture of Callisto into resonance
• Warm dust surface chemistry in protoplanetary disks. Formation of phyllosilicates
• Observing the gas component of circumplanetary disks around wide-orbit planet-mass companions in the (sub)mm regime
• Photoevaporation of the Jovian circumplanetary disk I. Explaining the orbit of Callisto and the lack of outer regular satellites

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• Herbig Stars: A Quarter Century of Progress
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• Revisiting equilibrium condensation and rocky planet compositions: Introducing the ECCOplanets code
• Magnetic disk winds in protoplanetary disks: Description of the model and impact on global disk evolution
• The "Drake equation" of exomoons -- a cascade of formation, stability and detection
• Circumplanetary disk ices II. Composition
• SHAMPOO: A stochastic model for tracking dust particles under the influence of non-local disk processes
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