Ruling Out ～100–300 GeV Thermal Relic Annihilating Dark Matter by Radio Observation of the Andromeda Galaxy

doi:10.3847/1538-4357/aafe0b

	Ruling Out ～100–300 GeV Thermal Relic Annihilating Dark Matter by Radio Observation of the Andromeda Galaxy
	Liu,Jun3,4 ; Leung,Chun Sing 2; Chan,Man Ho 1; Cui,Lang4
刊名	The Astrophysical Journal
	2019-02-20
卷号	872 期号:2
关键词	dark matter
ISSN号	0004-637X
DOI	10.3847/1538-4357/aafe0b
英文摘要	Abstract Over the past few years, some studies have claimed that annihilating dark matter with mass ～10–100 GeV can explain the GeV gamma-ray excess in our Galaxy. However, recent analyses of Fermi-LAT and radio observational data have ruled out the possibility of the thermal relic annihilating dark matter with mass m?≤?100 GeV for some popular annihilation channels. By using the new observed radio data of the Andromeda galaxy, we rule out the existence of ～100–300 GeV thermal relic annihilating dark matter for 10 annihilation channels. The lower limits of annihilating dark matter mass are improved to larger than 330 GeV for the most conservative case, which is a few times larger than the current best constraints. Moreover, these limits strongly disfavor the benchmark model of weakly interacting massive particles produced through the thermal freeze-out mechanism.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-872-2-aafe0b
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/2461]
专题	新疆天文台_射电天文研究室
作者单位	1.Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, People’s Republic of China; chanmh@eduhk.hk 2.Hong Kong Polytechnic University, Hong Kong, People’s Republic of China 3.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany 4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, People’s Republic of China
推荐引用方式 GB/T 7714	Liu,Jun,Leung,Chun Sing,Chan,Man Ho,等. Ruling Out ～100–300 GeV Thermal Relic Annihilating Dark Matter by Radio Observation of the Andromeda Galaxy[J]. The Astrophysical Journal,2019,872(2).
APA	Liu,Jun,Leung,Chun Sing,Chan,Man Ho,&Cui,Lang.(2019).Ruling Out ～100–300 GeV Thermal Relic Annihilating Dark Matter by Radio Observation of the Andromeda Galaxy.The Astrophysical Journal,872(2).
MLA	Liu,Jun,et al."Ruling Out ～100–300 GeV Thermal Relic Annihilating Dark Matter by Radio Observation of the Andromeda Galaxy".The Astrophysical Journal 872.2(2019).