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Testing the Axion-Conversion Hypothesis of 3.5 keV Emission with Polarization
Gong, Yan1; Chen, Xuelei1,2,3; Feng, Hua4,5
2017-02-10
发表期刊PHYSICAL REVIEW LETTERS
卷号118期号:6
摘要The recently measured 3.5 keV line in a number of galaxy clusters, the Andromeda galaxy (M31), and the Milky Way (MW) center can be well accounted for by a scenario in which dark matter decays to axionlike particles (ALPs) and subsequently convert to 3.5 keV photons in magnetic fields of galaxy clusters or galaxies. We propose to test this hypothesis by performing x-ray polarization measurements. Since ALPs can only couple to photons with a polarization orientation parallel to the magnetic field, we can confirm or reject this model by measuring the polarization of the 3.5 keV line and compare it to the orientation of the magnetic field. We discuss luminosity and polarization measurements for both a galaxy cluster and spiral galaxy, and provide a general relation between the polarization and galaxy inclination angle. This effect is marginally detectable with x-ray polarimetry detectors currently under development, such as the enhanced X-ray Timing and Polarization satellite, the Imaging X-ray Polarimetry Explorer and the X-ray Imaging Polarimetry Explorer. The sensitivity can be further improved in the future with detectors of a larger effective area or better energy resolutions.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
资助者Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; MoST 863 program(2012AA121701) ; MoST 863 program(2012AA121701) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Strategic Priority Research Program(XDB09020301) ; CAS Strategic Priority Research Program(XDB09020301) ; NSFC(11373030 ; NSFC(11373030 ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; 11633004 ; 11633004 ; 11633003) ; 11633003) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; MoST 863 program(2012AA121701) ; MoST 863 program(2012AA121701) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Strategic Priority Research Program(XDB09020301) ; CAS Strategic Priority Research Program(XDB09020301) ; NSFC(11373030 ; NSFC(11373030 ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; 11633004 ; 11633004 ; 11633003) ; 11633003)
DOI10.1103/PhysRevLett.118.061101
关键词[WOS]X-RAY-LINE ; DARK-MATTER ; MAGNETIC-FIELDS ; CHARGE-EXCHANGE ; MECHANISM ; CLUSTERS ; PHOTON ; SIGNAL
收录类别SCI
语种英语
资助者Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; MoST 863 program(2012AA121701) ; MoST 863 program(2012AA121701) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Strategic Priority Research Program(XDB09020301) ; CAS Strategic Priority Research Program(XDB09020301) ; NSFC(11373030 ; NSFC(11373030 ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; 11633004 ; 11633004 ; 11633003) ; 11633003) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; MoST 863 program(2012AA121701) ; MoST 863 program(2012AA121701) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Strategic Priority Research Program(XDB09020301) ; CAS Strategic Priority Research Program(XDB09020301) ; NSFC(11373030 ; NSFC(11373030 ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; 11633004 ; 11633004 ; 11633003) ; 11633003)
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000393747300002
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8299
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
4.Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
5.Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China
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Gong, Yan,Chen, Xuelei,Feng, Hua. Testing the Axion-Conversion Hypothesis of 3.5 keV Emission with Polarization[J]. PHYSICAL REVIEW LETTERS,2017,118(6).
APA Gong, Yan,Chen, Xuelei,&Feng, Hua.(2017).Testing the Axion-Conversion Hypothesis of 3.5 keV Emission with Polarization.PHYSICAL REVIEW LETTERS,118(6).
MLA Gong, Yan,et al."Testing the Axion-Conversion Hypothesis of 3.5 keV Emission with Polarization".PHYSICAL REVIEW LETTERS 118.6(2017).
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