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Formation of a disc gap induced by a planet :  effect of the deviation from Keplerian disc rotation

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Title: Formation of a disc gap induced by a planet :  effect of the deviation from Keplerian disc rotation
Authors: Kanagawa, K. D. Browse this author →KAKEN DB
Tanaka, H. Browse this author
Muto, T. Browse this author
Tanigawa, T. Browse this author
Takeuchi, T. Browse this author
Keywords: accretion, accretion discs
planets and satellites: formation
protoplanetary discs
Issue Date: 10-Feb-2015
Journal Title: Monthly Notices of the Royal Astronomical Society
Volume: 448
Issue: 1
Start Page: 994
End Page: 1006
Publisher DOI: 10.1093/mnras/stv025
Abstract: The gap formation induced by a giant planet is important in the evolution of the planet and the protoplanetary disc. We examine the gap formation by a planet with a new formulation of one-dimensional viscous discs which takes into account the deviation from Keplerian disc rotation due to the steep gradient of the surface density. This formulation enables us to naturally include the Rayleigh stable condition for the disc rotation. It is found that the derivation from Keplerian disc rotation promotes the radial angular momentum transfer and makes the gap shallower than in the Keplerian case. For deep gaps, this shallowing effect becomes significant due to the Rayleigh condition. In our model, we also take into account the propagation of the density waves excited by the planet, which widens the range of the angular momentum deposition to the disc. The effect of the wave propagation makes the gap wider and shallower than the case with instantaneous wave damping. With these shallowing effects, our one-dimensional gap model is consistent with the recent hydrodynamic simulations.
Rights: This article has been accepted for publication in Monthly notices of the Royal Astronomical Society©: 2015, Kanagawa, KD Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 金川 和弘

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