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arXiv 0804.3578astro-ph
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宇宙复合周围的磁场行为

Behavior of magnetic fields around the cosmic recombination

Keitaro Takahashi

摘要:

已经提出了几种机制来产生原始磁场,并且通常假设磁场不受由于宇宙复合导致的电离率急剧下降的影响。我们通过研究复合周围的磁场和流体运动的行为来研究这一假设的有效性。结合麦克斯韦方程组,分别考虑质子、电子和中性氢的流体方程,考虑了复合效应。我们发现在宇宙学尺度下磁场守恒所需的剩余电离率约为$10^{-10}$,远小于标准值$\sim 10^{-4}$。此外,我们将说明质子和电子在复合过程中的加速,这补偿了电流载流子的减少,以保持电流和磁场。

英文摘要:

Several mechanisms have been proposed to generate primordial magnetic fields and it is often assumed that magnetic fields are not affected by a sharp drop in ionization rate due to the cosmic recombination. We investigate the validity of the assumption by studying the behavior of magnetic fields and fluid motion around recombination. Fluid equations including the effect of recombination are considered for protons, electrons and neutral hydrogens separately, combining Maxwell equations. We find that the residual ionization rate required for the conservation of magnetic field at cosmological scales is about $10^{-10}$, which is much smaller than the standard value $\sim 10^{-4}$. Further we will show the acceleration of protons and electrons in the process of recombination which conpensates the decrease in the carrier of electric current in order to preserve electric current and then magnetic fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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