Observability of Forming Planets and their Circumplanetary Disks I. -- Parameter Study for ALMA

Abstract

We present mock observations of forming planets with ALMA. The possible detections of circumplanetary disks (CPDs) were investigated around planets of Saturn, 1, 3, 5, and 10 Jupiter-masses that are placed at 5.2 AU from their star. The radiative, three dimensional hydrodynamic simulations were then post-processed with RADMC3D and the ALMA Observation Simulator. We found that even though the CPDs are too small to be resolved, they are hot due to the accreting planet in the optically thick limit, therefore the best chance to detect them with continuum observations in this case is at the shortest ALMA wavelengths, such as Band 9 (440 microns). Similar fluxes were found in the case of Saturn and Jupiter-mass planets, as for the 10 ${\mathrm{M}}_{\mathrm{Jup}}$ gas-giant, due to temperature weighted optical depth effects: when no deep gap is carved, the planet region is blanketed by the optically thick circumstellar disk leading to a less efficient cooling there. A test was made for a 52 AU orbital separation, showed that optically thin CPDs are also detectable in band 7 but they need longer integration times ($>$5hrs). Comparing the gap profiles of the same simulation at various ALMA bands and the hydro simulation confirmed that they change significantly, first because the gap is wider at longer wavelengths due to decreasing optical depth; second, the beam convolution makes the gap shallower and at least 25% narrower. Therefore, caution has to be made when estimating planet masses based on ALMA continuum observations of gaps.

arXiv commentAccepted for publication at MNRAS. Typos are corrected since previous version. 11 pages, 5 tables, 4 figures

References in corpus (47)

• Streaming Instabilities in Protoplanetary Disks
• Using FU Orionis Outbursts to Constrain Self-Regulated Protostellar Disk Models
• A simple model for the evolution of the dust population in protoplanetary disks
• ALMA Survey of Lupus Protoplanetary Disks I: Dust and Gas Masses
• On the width and shape of gaps in protoplanetary disks
• A Major Asymmetric Dust Trap in a Transition Disk
• On the Luminosity of Young Jupiters
• A comparative study of disc-planet interaction
• Scattering by Interstellar Dust Grains. II. X-Rays
• LkCa 15: A Young Exoplanet Caught at Formation?
• Accreting Protoplanets in the LkCa 15 Transition Disk
• Observational Signatures of Planets in Protoplanetary Disks I: Gaps Opened by Single and Multiple Young Planets in Disks
• A Parametric Modeling Approach to Measuring the Gas Masses of Circumstellar Disks
• Planets opening dust gaps in gas disks
• Distribution of Accreting Gas and Angular Momentum onto Circumplanetary Disks
• Accretion of Jupiter-mass Planets in the Limit of Vanishing Viscosity
• Dust flow in gas disks in the presence of embedded planets
• The minimum mass of detectable planets in protoplanetary discs and the derivation of planetary masses from high resolution observations
• Planet migration in three-dimensional radiative discs
• Discovery of a Companion Candidate in the HD169142 Transition Disk and the Possibility of Multiple Planet Formation
• Statistics of Long Period Gas Giant Planets in Known Planetary Systems
• Circumplanetary disc properties obtained from radiation hydrodynamical simulations of gas accretion by protoplanets
• Particle Concentration At Planet Induced Gap Edges and Vortices: I. Inviscid 3-D Hydro Disks
• Radiation hydrodynamics with Adaptive Mesh Refinement and application to prestellar core collapse. I Methods
• Circumplanetary disk or circumplanetary envelope?
• Can dust coagulation trigger streaming instability?
• Planet formation signposts: observability of circumplanetary disks via gas kinematics
• Dust-trapping Rossby vortices in protoplanetary disks
• Stellar irradiated discs and implications on migration of embedded planets II: accreting-discs
• Gas and dust structures in protoplanetary disks hosting multiple planets
• Imaging the Inner and Outer Gaps of the Pre-Transitional Disk of HD 169142 at 7 mm
• Planet gaps in the dust layer of 3D protoplanetary disks: I. Hydrodynamical simulations of T Tauri disks
• Gaps, rings, and non-axisymmetric structures in protoplanetary disks - Emission from large grains
• NIR Spectroscopy of the HAeBe Star HD 100546: III. Further Evidence of an Orbiting Companion?
• Effects of the Planetary Temperature on the Circumplanetary Disk and on the Gap
• Sequential planet formation in the HD 100546 protoplanetary disk?
• On the Viability of the Magnetorotational Instability in Circumplanetary Disks
• The Sizes and Depletions of the Dust and Gas Cavities in the Transitional Disk J160421.7-213028
• Thermodynamics of Giant Planet Formation: Shocking Hot Surfaces on Circumplanetary Disks
• Circumplanetary disks around young giant planets: a comparison between core-accretion and disk instability
• The Evolution of Circumplanetary Disks around Planets in Wide Orbits: Implications for Formation Theory, Observations, and Moon Systems
• A Fast and Accurate Calculation Scheme for Ionization Degrees in Protoplanetary and Circumplanetary Disks with Charged Dust Grains
• New constraints on the disk characteristics and companion candidates around T Cha with VLT/SPHERE
• Protoplanetary disks including radiative feedback from accreting planets
• An ALMA Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass
• Orbital Evolution of Moons in Weakly Accreting Circumplanetary Disks
• Direct detection of precursors of gas giants formed by gravitational instability with the Atacama Large Millimetre/sub-millimetre Array

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• Observability of Forming Planets and their Circumplanetary Disks IV. -- with JWST & ELT
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