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

K. D. Kanagawa, H. Tanaka, T. Muto, T. Tanigawa, T. Takeuchi

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

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 onedimensional 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 fromKeplerian 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.

Original languageEnglish
Pages (from-to)994-1006
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume448
Issue number1
DOIs
Publication statusPublished - 2015 Mar 21
Externally publishedYes

Keywords

  • Accretion
  • Accretion discs
  • Planets and satellites: formation
  • Protoplanetary discs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Formation of a disc gap induced by a planet: Effect of the deviation from Keplerian disc rotation'. Together they form a unique fingerprint.

Cite this