Karlin, SM, Panić, O and van Loo, S orcid.org/0000-0003-4746-8500 (2023) Size-selective accretion of dust onto CPDs: Low CPD masses and filtration of larger grains. Monthly Notices of the Royal Astronomical Society. ISSN 0035-8711
Abstract
The major satellites of Jupiter and Saturn are believed to have formed in circumplanetary discs, which orbit forming giant protoplanets. Gas and dust in CPDs have different distributions and affect each other by drag, which varies with grain size. Yet simulations of multiple dust grain sizes with separate dynamics have not been done before. We seek to assess how much dust of each grain size there is in circumplanetary discs. We run multifluid 3D hydrodynamical simulations including gas and four discrete grain sizes of dust from 1μm to 1 mm, representing a continuous distribution. We consider a 1 Mjup protoplanet embedded in a protoplanetary disc around a 1 M⊙ star. Our results show a truncated MRN distribution at smaller grain sizes, which starts to tail off by a = 100μm and is near zero at 1 mm. Large dust grains, which hold most of the dust mass, have very inefficient accretion to the CPD, due to dust filtration. Therefore CPDs’ dust masses must be small, with mass ratio ∼ a few × 10¯⁶ to the protoplanet. These masses and the corresponding millimetre opacities are in line with CPD fluxes observed to date.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2023 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an author produced version of an article published in Monthly Notices of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | accretion, accretion discs, hydrodynamics, planets and satellites: formation, planets and satellites: gaseous planets, protoplanetary discs |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Funding Information: | Funder Grant number Royal Society RGF\EA\180158 STFC (Science and Technology Facilities Council) ST/T000287/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 Jan 2023 14:19 |
Last Modified: | 26 Jan 2023 09:07 |
Status: | Published online |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stad157 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:195616 |