Can a marginally open universe amplify magnetic fields?

被引：9

作者：

Shtanov, Yuri ^{[1
,2
]}

Sahni, Varun ^{[3
]}

机构：

[1] Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine

[2] Taras Shevchenko Natl Univ, Dept Phys, UA-03022 Kiev, Ukraine

[3] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2013年 / 01期

基金：

瑞士国家科学基金会;

关键词：

primordial magnetic fields; inflation; PERTURBATIONS; SPECTRUM; ORIGIN;

D O I：

10.1088/1475-7516/2013/01/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a series of recent papers, including arXiv:1210.1183, it was claimed that large-scale magnetic fields generated during inflation in a spatially open universe could remain astrophysically significant at the present time since they experienced superadiabatic amplification specific to an open universe. We reexamine this assertion and show that, on the contrary, large-scale magnetic fields in a realistic open universe decay in much the same manner as they would in a spatially flat universe. Consequently, their amplitude today is extremely small (B-0 less than or similar to 10(-59)G) and is unlikely to be of astrophysical significance.

引用

页数：15

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