Leptonic dark matter annihilation in the evolving universe: constraints and implications | |
Yuan, Qiang1,6; Yue, Bin2,6; Bi, Xiao-Jun1,3; Chen, Xuelei2,3; Zhang, Xinmin4,5 | |
刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS |
2010-10-01 | |
期号 | 10 |
关键词 | dark matter theory gamma ray theory recombination |
英文摘要 | The cosmic electron and positron excesses have been explained as possible dark matter (DM) annihilation products. In this work we investigate the possible effects of such a DM annihilation scenario during the evolution history of the Universe. We first calculate the extragalactic gamma-ray background (EGRB), which is produced through the final state radiation of DM annihilation to charged leptons and the inverse Compton scattering between electrons/positrons and the cosmic microwave background. The DM halo profile and the minimal halo mass, which are not yet well determined from the current N-body simulations, are constrained by the EGRB data from EGRET and Fermi telescopes. Then we discuss the impact of such leptonic DM models on cosmic evolution, such as the reionization and heating of intergalactic medium, neutral Hydrogen 21 cm signal and suppression of structure formation. We show that the impact on the Hydrogen 21 cm signal might show interesting signatures of DM annihilation, but the influence on star formation is not remarkable. Future observations of the 21 cm signals could be used to place new constraints on the properties of DM. |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000283577600012 |
内容类型 | 期刊论文 |
源URL | [http://ir.bao.ac.cn/handle/114a11/7809] |
专题 | 国家天文台_星系宇宙学研究部 |
作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Div Theoret Phys, Beijing 100049, Peoples R China 5.Chinese Acad Sci, TPCSF, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Yuan, Qiang,Yue, Bin,Bi, Xiao-Jun,et al. Leptonic dark matter annihilation in the evolving universe: constraints and implications[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(10). |
APA | Yuan, Qiang,Yue, Bin,Bi, Xiao-Jun,Chen, Xuelei,&Zhang, Xinmin.(2010).Leptonic dark matter annihilation in the evolving universe: constraints and implications.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10). |
MLA | Yuan, Qiang,et al."Leptonic dark matter annihilation in the evolving universe: constraints and implications".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2010). |
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