论文标题
磁磁性不稳定的磁磁，未对准的原始圆盘
Magnetorotational Instability in Diamagnetic, Misaligned Protostellar Discs
论文作者
论文摘要
在本研究中，我们解决了一个问题，即当恒星偶极磁场的径向分量外，还考虑了磁化不稳定的生长速率，此外还考虑了垂直分量。考虑到明显的磁管电流的光盘中的基准半径，我们进行了线性稳定性分析，以获得各种参数的磁化不稳定性的生长速率，例如径向与垂直成分的比例和磁场的梯度，磁场的梯度，Alfgenic Mach数字和DiaMagagnetization参数。我们的结果表明，磁场的磁电流和径向分量之间的相互作用增加了磁化不稳定性的生长速率，并产生垂直于圆盘平面的力，这可能会诱导扭矩。还表明，考虑到磁场的径向分量并考虑到磁场垂直成分中的径向梯度会导致轴对称的增长率（$ M = 0 $）和非轴对称（$ M = 1 $）的增长率增加。
In the present study, we addressed the question of how the growth rate of the magnetorotational instability is modified when the radial component of the stellar dipole magnetic field is taken into account in addition to the vertical component. Considering a fiducial radius in the disc where diamagnetic currents are pronounced, we carried out a linear stability analysis to obtain the growth rates of the magnetorotational instability for various parameters such as the ratio of the radial-to-vertical component and the gradient of the magnetic field, the Alfvenic Mach number and the diamagnetization parameter. Our results show that the interaction between the diamagnetic current and the radial component of the magnetic field increases the growth rate of the magnetorotational instability and generates a force perpendicular to the disc plane which may induce a torque. It is also shown that considering the radial component of the magnetic field and taking into account a radial gradient in the vertical component of the magnetic field causes an increase in the magnitudes of the growth rates of both the axisymmetric ($m=0$) and the non-axisymmetric ($m=1$) modes.
