Origin of magnetic fields in galaxies

Origin of magnetic fields in galaxies
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星系磁场的起源

DOI:
10.1103/physrevd.81.067301
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发表时间:
2009
期刊:
影响因子:
5
通讯作者:
R. Opher
R. Opher
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
R. S. Souza;R. Opher

文献摘要

被引文献

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在所有星系中,在低和高红移下都观测到微高斯磁场。这些强磁场的起源是天体物理学中一个具有挑战性的问题。在这里,我们表明,在原始宇宙中的自然等离子体波动(假设是随机的),预测的波动耗散定理,预测{approx}0.034 {mu}G领域超过{approx}0.3 kpc的区域在星系。如果由涨落耗散定理预测的偶极磁场不是完全随机的,则在>或约为0的区域上的微高斯场是随机的。0.34 KPC很容易获得。因此,该模型是一个强有力的候选人解决问题的起源磁场在<或约。高红移星系中的10{sup 9}年。
Microgauss magnetic fields are observed in all galaxies at low and high redshifts. The origin of these intense magnetic fields is a challenging question in astrophysics. We show here that the natural plasma fluctuations in the primordial Universe (assumed to be random), predicted by the fluctuation -dissipation theorem, predicts {approx}0.034 {mu}G fields over {approx}0.3 kpc regions in galaxies. If the dipole magnetic fields predicted by the fluctuation-dissipation theorem are not completely random, microgauss fields over regions > or approx. 0.34 kpc are easily obtained. The model is thus a strong candidate for resolving the problem of the origin of magnetic fields in < or approx. 10{sup 9} years in high redshift galaxies.