論文

査読有り 筆頭著者 責任著者
2014年4月

ON THE VIABILITY OF THE MAGNETOROTATIONAL INSTABILITY IN CIRCUMPLANETARY DISKS

ASTROPHYSICAL JOURNAL
  • Yuri I. Fujii
  • ,
  • Satoshi Okuzumi
  • ,
  • Takayuki Tanigawa
  • ,
  • Shu-ichiro Inutsuka

785
2
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/0004-637X/785/2/101
出版者・発行元
IOP PUBLISHING LTD

We examine whether the magnetorotational instability (MRI) can serve as a mechanism of angular momentum transport in circumplanetary disks. For the MRI to operate the ionization degree must be sufficiently high and the magnetic pressure must be sufficiently lower than the gas pressure. We calculate the spatial distribution of the ionization degree and search for the MRI-active region where the two criteria are met. We find that there can be thin active layers at the disk surface depending on the model parameters, however, we find hardly any region which can sustain well-developed MRI turbulence; when the magnetic field is enhanced by MRI turbulence at the disk surface layer, a magnetically dominated atmosphere encroaches on a lower altitude and a region of well-developed MRI turbulence becomes smaller. We conclude that if there are no angular momentum transfer mechanisms other than MRI in gravitationally stable circumplanetary disks, gas is likely to pile up until disks become gravitationally unstable, and massive disks may survive for a long time.

Web of Science ® 被引用回数 : 38

リンク情報
DOI
https://doi.org/10.1088/0004-637X/785/2/101
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000335736800020&DestApp=WOS_CPL
URL
http://orcid.org/0000-0002-3648-0507
ID情報
  • DOI : 10.1088/0004-637X/785/2/101
  • ISSN : 0004-637X
  • eISSN : 1538-4357
  • ORCIDのPut Code : 19830062
  • Web of Science ID : WOS:000335736800020
  • ORCIDで取得されたその他外部ID : a:1:{i:0;a:1:{s:8:"other-id";s:19:"WOS:000335736800020";}}

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