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Cai, Rong-Gen; Ding, Yu-Chen; Yang, Xing-Yu; Zhou, Yu-Feng
Constraints on a mixed model of dark matter particles and primordial black holes from the galactic 511 keV line
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Language英语
AbstractThe galactic 511 keV gamma-ray line has been observed since 1970's, and was identified as the result of electron-positron annihilation, but the origin of such positrons is still not clear. Apart from the astrophysical explanations, the possibilities that such positrons come from dark matter (DM) annihilation are also widely studied. Primordial black hole (PBH) is also an extensively studied candidate of DM. If PBHs exist, the DM particles may be gravitationally bound to the PBHs and form halo around PBHs with density spikes. DM annihilation in these density spikes can enhance the production rate of positrons from DM particles, but the signal morphology is similar to the decaying DM. We consider such a mixed model consisting of DM particles and PBHs and obtain the upper limit from the data of 511 keV gamma-ray line from INTEGRAL/SPI on the decaying component of DM particles and the constraint on the PBH abundance. These constraints are general and independent of particle DM models. For the mixed model consisting of excited DM and PBHs, the constraints on the PBH abundance can be down to O(10-17) for DM particle with mass around 1TeV, which is more stringent than that obtained from the extragalactic gamma-ray background.
2021
ISSN1475-7516
Issue3Pages:57
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1088/1475-7516/2021/03/057
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27296
CollectionSCI期刊论文
Affiliation1.[Cai, Rong-Gen
2.Ding, Yu-Chen
3.Yang, Xing-Yu
4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
6.Univ Chinese Acad Sci, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China
Recommended Citation
GB/T 7714
Cai, Rong-Gen,Ding, Yu-Chen,Yang, Xing-Yu,et al. Constraints on a mixed model of dark matter particles and primordial black holes from the galactic 511 keV line[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2021(3):57.
APA Cai, Rong-Gen,Ding, Yu-Chen,Yang, Xing-Yu,&Zhou, Yu-Feng.(2021).Constraints on a mixed model of dark matter particles and primordial black holes from the galactic 511 keV line.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(3),57.
MLA Cai, Rong-Gen,et al."Constraints on a mixed model of dark matter particles and primordial black holes from the galactic 511 keV line".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .3(2021):57.
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