TY - JOUR
T1 - The effect of poloidal magnetic field on type i planetary migration
AU - Muto, Takayuki
AU - MacHida, Masahiro N.
AU - Inutsuka, Shu Ichiro
N1 - Funding Information:
T. M. thanks Frederic Masset, Clement Baruteau and Hui Zhang for useful discussions at IAUS 249. The authors thank T. Matsumoto for the great help in carrying out numerical calculation. Numerical calculations were in part carried out on VPP5000 at the Center for Computational Astrophysics, CfCA, of National Astronomical Observatory of Japan. T. M. is supported by Grants-in-Aid for JSPS Fellows (19·2409) from MEXT of Japan. M. M. is supported by Grants-in-Aid (18740104) from MEXT of Japan. S. I. is supported by Grants-in-Aid (15740118, 16077202, and 18540238) from MEXT of Japan.
PY - 2007/10
Y1 - 2007/10
N2 - 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.
AB - 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.
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U2 - 10.1017/S1743921308016906
DO - 10.1017/S1743921308016906
M3 - Article
AN - SCOPUS:44249112633
SN - 1743-9213
VL - 3
SP - 401
EP - 406
JO - Proceedings of the International Astronomical Union
JF - Proceedings of the International Astronomical Union
IS - S249
ER -