STRENGTH OF THE SPONTANEOUSLY EMITTED COLLECTIVE APERIODIC MAGNETIC FIELD FLUCTUATIONS IN THE REIONIZED EARLY INTERGALACTIC MEDIUM
STRENGTH OF THE SPONTANEOUSLY EMITTED COLLECTIVE APERIODIC MAGNETIC FIELD FLUCTUATIONS IN THE REIONIZED EARLY INTERGALACTIC MEDIUM
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再电离的早期星系际介质中自发发射的集体非周期性磁场波动的强度
DOI：
10.1088/0004-637x/778/1/39
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Felten
中科院分区：
文献类型：
--
作者：
R. Schlickeiser;T. Felten
非磁化、完全电离的等离子体自发地发射非周期性的湍流磁场波动。其波动强度主要由最近发现的集体阻尼模式的贡献决定，该模式将热非相对论电子-质子等离子体中总磁场强度的早期估计修改为G，其中g表示等离子体参数，βe表示在无碰撞阻尼的情况下以光速为单位的热电子速度。考虑到同时粘性阻尼，将估计值降低为 |δB|eq = 2305g(nemec2)1/2 G，仅取决于等离子体参数 g 和电子密度 ne。对于未磁化的星际介质，在再电离开始后，该机制的场强约为 6.8 × 10−13 G（无碰撞阻尼）和 1.5 × 10−16 G（粘性阻尼）。宇宙空洞中发射的非周期性涨落的最大空间尺度可能达到 1015 厘米。
Nonmagnetized, fully ionized plasmas spontaneously emit aperiodic turbulent magnetic field fluctuations. Its fluctuation intensities are dominated by the contribution from a recently discovered collective, damped mode, which modifies the earlier estimate of the total magnetic field strength in a thermal nonrelativistic electron-proton plasma to G, where g denotes the plasma parameter and βe the thermal electron velocity in units of the speed of light, in the case of no collisional damping. Accounting for simultaneous viscous damping reduces the estimate to |δB|eq = 2305g(nemec2)1/2 G, depending only on the plasma parameter g and the electron density ne. For the unmagnetized intergalactic medium, immediately after the reionization onset the field strengths from this mechanism are about 6.8 × 10−13 G for no collisional damping and 1.5 × 10−16 G for viscous damping. Maximum spatial scales of 1015 cm of the emitted aperiodic fluctuations in cosmic voids are possible.
第一批恒星和星系形成过程中的小规模发电机作用 - I 理想 MHD 极限
影响因子：
6.5
作者：
Schleicher;D. R. G;Banerjee;Arshakian
通讯作者：
Arshakian