论文标题
通过离子循环基因在群内培养基中通过离子回旋波重新加速
Electron Re-acceleration via Ion Cyclotron Waves in the Intracluster Medium
论文作者
论文摘要
在星系簇中，预计簇内培养基（ICM）将具有1-100 MEV能量的“化石”宇宙射线电子（CRE）的弥漫性，长寿和看不见的种群。这些CRE如果通过100倍的能量重新加速，则可以为群集无线电，文物和凤凰促进同步子发光度。当Cre散射在ICM被压缩，扩张或剪切时产卵的离子级尺度波上的CRE散射可以帮助重新加速。我们研究了由1D完全动力学粒子中的模拟中连续驱动的压缩产生的离子回旋子（IC）波引起的CRE散射和能量增益。我们发现，通过IC波将CRE的俯仰角散射通过磁泵诱导能量增益。在最佳的IC共振矩范围内，CRE在一个压缩/扩张周期中最多可在磁场扩增〜3-6X中获得高达约10-30％的初始能量，假设没有进一步的散射和平均初始螺距角度，则可以在一个压缩/扩张中获得〜3-6X。
In galaxy clusters, the intracluster medium (ICM) is expected to host a diffuse, long-lived, and invisible population of "fossil" cosmic-ray electrons (CRe) with 1-100 MeV energies. These CRe, if re-accelerated by 100x in energy, can contribute synchrotron luminosity to cluster radio halos, relics, and phoenices. Re-acceleration may be aided by CRe scattering upon the ion-Larmor-scale waves that spawn when ICM is compressed, dilated, or sheared. We study CRe scattering and energy gain due to ion cyclotron (IC) waves generated by continuously-driven compression in 1D fully kinetic particle-in-cell simulations. We find that pitch-angle scattering of CRe by IC waves induces energy gain via magnetic pumping. In an optimal range of IC-resonant momenta, CRe may gain up to ~10-30% of their initial energy in one compress/dilate cycle with magnetic field amplification ~3-6x, assuming adiabatic decompression without further scattering and averaging over initial pitch angle.
