The effect of poloidal magnetic field on type i planetary migration

Takayuki Muto, Masahiro N. MacHida, Shu Ichiro Inutsuka

Research output: Contribution to journalArticlepeer-review


We study the effect of poloidal magnetic field on type I planetary migration by linear perturbation analysis with the shearing-sheet approximation and the analytic results are compared with numerical calculation. We investigate the cases where magneto-rotational instability (MRI) does not occur: either the disk is two-dimensional, or a very strong field is exerted. We derive formulae for torque exerted on the planet for both cases. We find that two-dimensional torque is suppressed when plasma beta is less than 1 and three-dimensional modes dominate, in contrast to unmagnetized case.

Original languageEnglish
Pages (from-to)401-406
Number of pages6
JournalProceedings of the International Astronomical Union
Issue numberS249
Publication statusPublished - Oct 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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