Dark Matter Search in Dwarf Irregular Galaxies with Ten Years of Data from the Ice Cube Neutrino Observatory  

作　　者：Yi-Fei Lü Ben-Yang Zhu Rong-Lan Li Xue-Kang Guo Tian-Ci Liu Yong-Bo Huang Yun-Feng Liang 

机构地区：[1]Guangxi Key Laboratory for Relativistic AstrophysicsSchool of Physical Science and TechnologyGuangxi University,Nanning 530004,China

出　　处：《Research in Astronomy and Astrophysics》2024年第3期75-82,共8页天文和天体物理学研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFF0503304);the National Natural Science Foundation of China(No.12133003)and Guangxi Science Foundation(No.2019AC20334)。

摘　　要：Dwarf irregular galaxies(dIrrs),as rotationally supported systems,have more reliable J-factor measurements than dwarf spheroidal galaxies and have received attention as targets for dark matter detection in recent years.In this paper,we use 10 yr of IceCube muon-track data and an unbinned maximum-likelihood-ratio method to search for neutrino signals beyond the background from the directions of seven dIrrs,aiming to detect neutrinos produced by heavy annihilation dark matter.We do not detect any significant signal.Based on such null results,we calculate the upper limits on the velocity-averaged annihilation cross section for 1 TeV–10 PeV dark matter.Our limits,although weaker than the strictest constraints in the literature in this mass range,are also a good complement to the existing results considering the more reliable J-factor measurements of dIrrs.

关 键 词：(cosmology) dark matter-cosmology theory-galaxies DWARF 

分 类 号：P145.9[天文地球—天体物理] P112[天文地球—天文学]