ELECTROMAGNETIC-RADIATION FROM A GLOBAL COSMIC STRING IN AN EXTERNAL MAGNETIC-FIELD

被引：3

作者：

HARARI, DD ^{[1
]}

FRANCISCO, J ^{[1
]}

MAZZITELLI, D ^{[1
]}

机构：

[1] INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY

来源：

PHYSICS LETTERS B | 1991年 / 266卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)91038-W

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A global cosmic string may couple to electromagnetism as a consequence of anomalous triangle diagrams. In an external magnetic field, the gradients of the Nambu-Goldstone boson field around the string give rise to an extended polarization current. When the string oscillates, it radiates electromagnetic waves. We estimate the strength of the effect for representative values of astrophysical magnetic fields. We also discuss implications for axion strings if a primordial cosmological magnetic field existed at early times.

引用

页码：269 / 274

页数：6

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