3D MHD simulations of accretion on to stars with tilted magnetic and rotational axes
3D MHD simulations of accretion on to stars with tilted magnetic and rotational axes
复制标题
具有倾斜磁轴和旋转轴的恒星吸积的 3D MHD 模拟
DOI:
10.1093/mnras/stab1724
复制
发表时间:
2021
影响因子:
4.8
通讯作者:
Lovelace, R V
中科院分区:
文献类型:
--
作者:
Romanova, M M;Koldoba, A V;Ustyugova, G V;Blinova, A A;Lai, D;Lovelace, R V
We present results of global 3D magnetohydrodynamic simulations of accretion on to magnetized stars where both the magnetic and rotational axes of the star are tilted about the rotational axis of the disc. We observed that initially the inner parts of the disc are warped, tilted, and precess due to the magnetic interaction between the magnetosphere and the disc. Later, larger tilted discs form with the size increasing with the magnetic moment of the star. The normal vector to the discs are tilted at different angles, from ∼5°–10° up to ∼30°–40°. Small tilts may result from the winding of the magnetic field lines about the rotational axis of the star and the action of the magnetic force which tends to align the disc. Another possible explanation is the magnetic Bardeen–Petterson effect in which the disc settles in the equatorial plane of the star due to precessional and viscous torques in the disc. Tilted discs slowly precess with the time-scale of the order of ∼50 Keplerian periods at the reference radius (∼3 stellar radii). Our results can be applied to different types of stars where signs of tilted discs and/or slow precession have been observed.
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影响因子:
4.8
作者:
P. Ivanov;A. Illarionov
通讯作者:
P. Ivanov;A. Illarionov
DOI:
10.1111/j.1365-2966.2006.11192.x
发表时间:
2006-10
影响因子:
4.8
作者:
M. Long;M. Romanova;R. Lovelace
通讯作者:
M. Long;M. Romanova;R. Lovelace
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
A. V. Koldoba;G. V. Ustyugova;M. Romanova;R. Lovelace
通讯作者:
R. Lovelace
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
S. Artemenko;K. Grankin;P. Petrov
通讯作者:
P. Petrov
影响因子:
1
作者:
A. Zhilkin;A. Zhilkin;D. Bisikalo
通讯作者:
A. Zhilkin;A. Zhilkin;D. Bisikalo