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DOI	10.1126/science.aaw3772
	The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations
	Dessert C.; Rodd N.L.; Safdi B.R.
发表日期	2020
ISSN	0036-8075
起始页码	1465
结束页码	1467
卷号	367 期号:6485
英文摘要	Observations of nearby galaxies and galaxy clusters have reported an unexpected x-ray emission line around 3.5 kilo–electron volts (keV). Proposals to explain this line include decaying dark matter —in particular, that the decay of sterile neutrinos with a mass around 7 keV could match the available data. If this interpretation is correct, the 3.5-keV line should also be emitted by dark matter in the halo of the Milky Way. We used more than 30 megaseconds of XMM-Newton (X-ray Multi-Mirror Mission) blank-sky observations to test this hypothesis, finding no evidence of the 3.5-keV line emission from the Milky Way halo. We set an upper limit on the decay rate of dark matter in this mass range, which is inconsistent with the possibility that the 3.5-keV line originates from dark matter decay. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	astrophysics cosmology hypothesis testing molecular analysis X-ray analysis article X ray
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133605
推荐引用方式 GB/T 7714	Dessert C.,Rodd N.L.,Safdi B.R.. The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations[J]. Science,2020,367(6485).
APA	Dessert C.,Rodd N.L.,&Safdi B.R..(2020).The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations.,367(6485).
MLA	Dessert C.,et al."The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations".367.6485(2020).