论文标题
非理想的磁流失动力学与湍流I：Protostellar盘形成的主要过程？
Non-ideal magnetohydrodynamics vs turbulence I: Which is the dominant process in protostellar disc formation?
论文作者
论文摘要
非理想的磁水动力学（MHD）是主要过程。我们研究了磁场（理想和非理想）以及湍流（亚和跨性别者）对与原子盘形成几乎同时形成的脉冲盘形成的影响。这是通过建模1〜m $ _ \ odot $ gas Cloud的重力塌陷来完成的，该$ _ \ odot $ gas Cloud用磁场螺纹并以旋转和湍流速度施加。我们研究了平行/反平行/垂直于旋转轴的磁场，两个旋转速率和四个马赫数。盘形成优先发生在包括非理想MHD的模型中，其中磁场是反行或垂直于旋转轴的。这与初始旋转速率和湍流水平无关，表明亚音速湍流在影响盘形成中起着最小的作用。除了受湍流初始水平影响的第一核流出外，非理想的MHD过程比在低质量恒星周围的圆盘形成期间比湍流过程更重要。
Non-ideal magnetohydrodynamics (MHD) is the dominant process. We investigate the effect of magnetic fields (ideal and non-ideal) and turbulence (sub- and transsonic) on the formation of circumstellar discs that form nearly simultaneously with the formation of the protostar. This is done by modelling the gravitational collapse of a 1~M$_\odot$ gas cloud that is threaded with a magnetic field and imposed with both rotational and turbulent velocities. We investigate magnetic fields that are parallel/anti-parallel and perpendicular to the rotation axis, two rotation rates and four Mach numbers. Disc formation occurs preferentially in the models that include non-ideal MHD where the magnetic field is anti-parallel or perpendicular to the rotation axis. This is independent of the initial rotation rate and level of turbulence, suggesting that subsonic turbulence plays a minimal role in influencing the formation of discs. Aside from first core outflows which are influenced by the initial level of turbulence, non-ideal MHD processes are more important than turbulent processes during the formation of discs around low-mass stars.
