Andromeda galaxy和英仙座星系团X射线谱中一条未识别的谱线
An unidentified line in X-ray spectra of the Andromeda galaxy and Perseus galaxy cluster
摘要:
本文报道了用XMM-牛顿望远镜的MOS和PN照相机观测到的M31星系和英仙座星系团的X射线谱中一条3.52 ± 0.02 keV的弱线。这条线在星系或星系团的光谱中不被认为是原子线。它在靠近天体中心的地方变得更强;英仙座比M31更强;在深空数据集的光谱中不存在。虽然很难排除每个物体的特征是由于仪器效应或原子线,但它与暗物质衰变线的行为一致。未来在多个物体中检测到这条线可能有助于揭示其性质。
英文摘要:
We report a weak line at 3.52+/-0.02 keV in X-ray spectra of M31 galaxy and the Perseus galaxy cluster observed by MOS and PN cameras of 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'' dataset. 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.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。