由流动等离子体驱动的Biermann电池
The Biermann battery driven by a streaming plasma
摘要：
比尔曼电池是宇宙中一种很有前途的种子磁场产生机制。我们提出了一种新的驱动机制的Biermann电池在非均匀等离子体的光束组件。回流引起的不均匀电子流会产生与密度梯度不平行的电子压梯度。因此，由Biermann电池产生磁场。通过对三流体等离子体的数值模拟，揭示了新的磁场产生机制。通过这种机制，第一宇宙射线可以产生红移约为20的天体物理尺度的种子磁场。
英文摘要：
The Biermann battery is a promising generation mechanism of a seed magnetic field in the universe. We propose a new driving mechanism for the Biermann battery in an inhomogeneous plasma with a beam component. An inhomogeneous electron flow induced by the return current can make an electron pressure gradient which is not parallel to the density gradient. As a result, the magnetic field is generated by the Biermann battery. We demonstrate the new generation mechanism of the magnetic field by conducting three-fluid plasma simulations. By this mechanism, the first cosmic rays can generate the seed magnetic field with astrophysical scales at redshift around 20.
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