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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >The impact of the Hall effect during cloud core collapse: Implications for circumstellar disk evolution
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The impact of the Hall effect during cloud core collapse: Implications for circumstellar disk evolution

机译：云核核崩溃期间霍尔效应的影响：外观磁盘进化的影响

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We perform three-dimensional radiation non-ideal magnetohydrodynamics simulations and investigate the impact of the Hall effect on the angular momentum evolution in collapsing cloud cores in which the magnetic field B and angular momentum J(ang) are misaligned with each other. We find that the Hall effect noticeably changes the magnetic torques in the pseudo-disk, and strengthens and weakens the magnetic braking in cores with acute and obtuse relative angles between B and J(ang), respectively. This suggests that the bimodal evolution of the disk size may occur in the early disk evolutionary phase even if B and J(ang) are randomly distributed. We show that a counter-rotating envelope forms in the upper envelope of the pseudo-disk in cloud coreswith obtuse relative angles. We also find that a counter-rotating region forms at the midplane of the pseudo-disk in cloud cores with acute relative angles. The former and latter types of counter-rotating envelopes may be associated with young stellar objects with large (r similar to 100 au) and small (r less than or similar to 10 au) disks, respectively.
机译：我们执行三维辐射非理想磁流动动力学模拟，研究了霍尔效应对倒塌云核心角动量演变的影响，其中磁场B和角动量j（ang）彼此不对准。我们发现霍尔效应显着改变伪盘中的磁性扭矩，并分别加强芯的磁性制动，并分别在B和J（Ang）之间的急性和钝角相对角度。这表明即使B和J（ANG）随机分布，也可以在早期磁盘进化阶段发生磁盘大小的双峰演变。我们表明，在云Coreswith的伪盘的上部包络中形成反向旋转的信封在云核心钝角的上部包络。我们还发现，在具有急性相对角度的云核心的伪盘的中平面处形成反向旋转区域。前者和后一种类型的反向旋转信封可以与大（R类似于100 AU）的年轻恒星物体相关联，并且分别小（R小于或类似于10AU）磁盘。

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