论文标题
Biermann电池由宇宙射线流诱导的电阻加热提供动力
Biermann Battery Powered by Resistive Heating Induced by Cosmic Ray Streaming
论文作者
论文摘要
最近有人提出，宇宙射线在早期宇宙中产生种子磁场。在本文中，我们提出了宇宙射线的另一种一代磁场机理，该机理是由宇宙射线流动引起的电阻加热驱动的Biermann电池。与其他先前提出的机制相比，这种机制在小规模，低温和强化区域中占主导地位。由于预计宇宙射线会在第一批恒星去世后加速，因此该机制可以在早期宇宙的结构形成期间起作用。我们表明，它使种子磁场具有足够的强度，以使后续的发电机将其放大到当前星系中的微型高斯水平。
It is recently proposed that cosmic rays generate a seed magnetic field in the early universe. In this paper, we propose another generation mechanism of magnetic fields by cosmic rays, which is the Biermann battery driven by resistive heating induced by the streaming of cosmic rays. This mechanism is dominant in small-scale, low-temperature, and strongly-ionized regions, compared with other previously proposed mechanisms. Because cosmic rays are expected to be accelerated after the death of the first stars, this mechanism can work during structure formation in the early universe. We show that it makes the seed magnetic field with sufficient strength for the subsequent dynamo to amplify it to the micro Gauss level in the current galaxies.
