Constraining decaying dark matter

被引：7
作者：
Huo, Ran [1 ]
机构：
[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
来源：
PHYSICS LETTERS B | 2011年 / 701卷 / 05期
关键词：
Dark matter; Cosmic microwave background; Structure formation; POWER SPECTRUM; CMB; ANISOTROPY;
D O I：
10.1016/j.physletb.2011.06.053
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We revisited the decaying dark matter (DDM) model, in which one collisionless particle decays early into two collisionless particles, that are potentially dark matter particles today. The effect of DDM will be manifested in the cosmic microwave background (CMB) and structure formation. With a systematic modification of CMB calculation tool camb, we can numerically calculate this effect, and compare it to observations. Further Markov Chain Monte Carlo cosmomc runnings update the constraints in that model: the free streaming length lambda(FS) less than or similar to 0.5 Mpc for nonrelativistic decay, and (M-DDM/keV Y)(2) T-d/yr less than or similar to 5 x 10(-5) for relativistic decay. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：530 / 534
页数：5
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