论文标题
在附近的Galaxy簇中使用12年的费米LAT数据消灭暗物质搜索
Annihilating Dark Matter Search with 12 Years of Fermi LAT Data in Nearby Galaxy Clusters
论文作者
论文摘要
星系簇是宇宙中最大的病毒化物体，因此具有高暗物质（DM）浓度。这种丰富的暗物质使它们成为间接DM搜索的有希望的目标。在这里，我们报告了搜索的详细信息，利用了将近12年的费米/LAT数据，从GEV能量频段中WIMP暗物质的伽玛射线签名。从中，我们介绍了BB-bar，W+W-和Gamma-Gamma通道的歼灭横截面上的约束，这些通道来自附近五个高银河纬度星系群（Centairus，coma，coma，vergo，pergo，perseus and perseus and fornax）的特征信号的未检测。我们讨论了由于选定对象的DM光晕中存在子结构以及DM概况中不确定性对提出结果的不确定性的影响，因此对信号提升的潜力。我们断言，所获得的极限在一个小因素之内，与基于矮球星系的费米/LAT观测值的最佳可用限制相当。
Galaxy clusters are the largest virialised objects in the Universe, and as such, have a high dark matter (DM) concentration. This abundance of dark matter makes them promising targets for indirect DM searches. Here we report the details of a search, utilising almost 12~years of Fermi/LAT data, for gamma ray signatures from the pair annihilation of WIMP dark matter in the GeV energy band. From this, we present the constraints on the annihilation cross section for the bb-bar, W+W- and gamma-gamma channels, derived from the non-detection of a characteristic signal from five nearby high galactic latitude galaxy clusters (Centaurus, Coma, Virgo, Perseus and Fornax). We discuss the potential of a boost to the signal due the presence of substructures in the DM halos of selected objects, as well as the impact of uncertainties in DM profiles on the presented results. We assert that the obtained limits are, within a small factor, comparable to the best available limits of those based on Fermi/LAT observations of dwarf spheroidal galaxies.
