Origin of magnetic fields in galaxies

被引：18

作者：

de Souza, Rafael S. ^{[1
]}

Opher, Reuven ^{[1
]}

机构：

[1] Univ Sao Paulo, IAG, BR-05508900 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW D | 2010年 / 81卷 / 06期

基金：

巴西圣保罗研究基金会;

关键词：

LARGE-SCALE STRUCTURE; DYNAMOS; GENERATION;

D O I：

10.1103/PhysRevD.81.067301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 0.034 mu G fields over similar to 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 greater than or similar to 0.34 kpc are easily obtained. The model is thus a strong candidate for resolving the problem of the origin of magnetic fields in less than or similar to 10(9) years in high redshift galaxies.

引用

页数：4