Unidentified Line in X-Ray Spectra of the Andromeda Galaxy and Perseus Galaxy Cluster

被引：457
|
作者：
Boyarsky, A. [1 ]
Ruchayskiy, O. [2 ]
Iakubovskyi, D. [3 ,4 ]
Franse, J. [1 ,5 ]
机构：
[1] Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands
[2] Ecole Polytech Fed Lausanne, FSB ITP LPPC, CH-1015 Lausanne, Switzerland
[3] Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine
[4] Natl Univ Kyiv Mohyla Acad, UA-04070 Kiev, Ukraine
[5] Leiden Univ, Leiden Observ, NL-2333 CA Leiden, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 25期
基金：
美国国家航空航天局; 瑞士国家科学基金会;
关键词：
XMM-NEWTON OBSERVATIONS; PHOTON IMAGING CAMERA; DARK-MATTER; STERILE NEUTRINOS; CATALOG; EDGE; II;
D O I：
10.1103/PhysRevLett.113.251301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report a weak line at 3.52 +/- 0.02 keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p-n (PN) CCD cameras of the XMM-Newton telescope. This line is not known as an atomic line in the spectra of galaxies or clusters. It becomes stronger towards the centers of the objects; is stronger for Perseus than for M31; is absent in the spectrum of a deep "blank sky" data set. Although for each object it is hard to exclude that the feature is due to an instrumental effect or an atomic line, it is consistent with the behavior of a dark matter decay line. Future (non-) detections of this line in multiple objects may help to reveal its nature.
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页数：6
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