Evolution of primordial dark matter planets in the early Universe

被引:2
作者
Kiren, O., V [1 ]
Arun, Kenath [1 ,2 ]
Sivaram, C. [3 ]
机构
[1] CHRIST Deemed Univ, Dept Phys & Elect, Bengaluru 560029, India
[2] Christ Jr Coll, Bangalore 560029, Karnataka, India
[3] Indian Inst Astrophys, Bangalore 560034, Karnataka, India
关键词
Dark matter; DM planets; Early Universe;
D O I
10.1016/j.asr.2021.04.016
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
In a recent paper we had discussed possibility of DM at high redshifts forming primordial planets composed entirely of DM to be one of the reasons for not detecting DM (as the flux of ambient DM particles would be consequently reduced). In this paper we discuss the evolution of these DM objects as the Universe expands. As Universe expands there will be accretion of DM, helium and hydrogen layers (discussed in detail) on these objects. As they accumulate more and more mass, the layers get heated up leading to nuclear reactions which burn H and He when a critical thickness is reached. In the case of heavier masses of these DM objects, matter can be ejected explo-sively. It is found that the time scale of ejection is smaller than those from other compact objects like neutron stars (that lead to x-ray bursts). These flashes of energy could be a possible observational signature for these dense DM objects. (C) 2021 COSPAR. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:2050 / 2056
页数:7
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