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Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. Galaxy cluster
Yuan Q(袁强); Bi XJ(毕效军); Yuan, Q; Bi, XJ; Huang, F; Chen, XL
2009
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号10页码:13
通讯作者[Yuan, Qiang ; Bi, Xiaojun] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Huang, Feng ; Chen, Xuelei] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
摘要In this work we calculate the Sunyaev-Zel'dovich (SZ) effect due to the e(+)e(-) from dark matter (DM) annihilation in galaxy clusters. Two candidates of DM particle, ( 1) the weakly-interacting massive particle (WIMP) and ( 2) the light dark matter (LDM) are investigated. For each case, we also consider several DM profiles with and without central cusp. We generally find smaller signals than previously reported. Moreover, the diffusion of electrons and positrons in the galaxy clusters, which was generally thought to be negligible, is considered and found to have significant effect on the central electron/positron distribution for DM profile with large spatial gradient. We find that the SZ effect from WIMP is almost always non-observable, even for the highly cuspy DM profile, and using the next generation SZ interferometer such as ALMA. Although the signal of the LDM is much larger than that of the WIMP, the final SZ effect is still very small due to the smoothing effect of diffusion. Only for the configuration with large central cusp and extremely small diffusion effect, the LDM induced SZ effect might have a bit chance of being detected.
文章类型Article
关键词dark matter theory galaxy clusters Sunyaev-Zeldovich effect
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1088/1475-7516/2009/10/013
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000272271800013
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240359
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Yuan Q,Bi XJ,Yuan, Q,et al. Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. Galaxy cluster[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(10):13.
APA 袁强,毕效军,Yuan, Q,Bi, XJ,Huang, F,&Chen, XL.(2009).Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. Galaxy cluster.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10),13.
MLA 袁强,et al."Dark matter annihilation and non-thermal Sunyaev-Zel'dovich effect: I. Galaxy cluster".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2009):13.
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