Insight into primordial magnetic fields from 21-cm line observation with EDGES experiment

被引：29

作者：

Minoda, Teppei ^{[1
]}

Tashiro, Hiroyuki ^{[1
]}

Takahashi, Tomo ^{[2
]}

机构：

[1] Nagoya Univ, Dept Phys & Astrophys, Nagoya, Aichi 4648602, Japan

[2] Saga Univ, Dept Phys, Saga 8408502, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 488卷 / 02期

关键词：

magnetic fields; cosmology: theory; dark ages; reionization; first stars; GENERATION; TRANSITION; UNIVERSE;

D O I：

10.1093/mnras/stz1860

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent observation of the 21-cm global absorption signal by EDGES suggests that the intergalactic medium (IGM) gas has been cooler than the cosmic microwave background during 15 less than or similar to z less than or similar to 20. This result can provide a strong constraint on heating sources for the IGM gas at these redshifts. In this paper we study the constraint on the primordial magnetic fields (PMFs) by the EDGES result. The PMFs can heat the IGM gas through their energy dissipation due to the magnetohydrodynamic effects. By numerically solving the thermal evolution of the IGM gas with the PMFs, we find that the EDGES result gives a stringent limit on the PMFs as B-1Mpc less than or similar to 10(-10) G.

引用

页码：2001 / 2005

页数：5

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