Prospects for gamma-ray observations of Hercules cluster

IF 0.2 Q4 ASTRONOMY & ASTROPHYSICS
V. Voitsekhovskyi
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引用次数: 0

Abstract

Galaxy clusters (GCs) are the largest and most massive gravitationally bound objects in the large-scale structure of the Universe. Due to keV temperatures of virialized gas in the intracluster medium (ICM) and presence of cosmic rays (CRs), galaxy clusters are effective sources of thermal X-ray radiation and non-thermal leptonic (synchrotron) radio emission. Galaxy clusters are also store-rooms for hadronic CRs, but non-thermal hadronic gamma-ray emission (mainly, due to pp collisions and subsequent pion decay) from galaxy clusters has not been detected yet. In this work we present the simulation of the expected non-thermal hadronic gamma-ray and neutrino emission from the dominant part of Hercules cluster (A2151) and estimated a perspective of detection of this emission by existing (Fermi-LAT, LHASSO, IceCube) and planned (CTA, IceCube-Gen2) ground-based and space-based detectors.
大力神星团伽马射线观测展望
星系团(GC)是宇宙大尺度结构中最大、质量最大的引力束缚物体。由于团簇内介质(ICM)中病毒化气体的keV温度和宇宙射线(CR)的存在,星系团是热X射线辐射和非热轻子(同步加速器)无线电发射的有效来源。星系团也是强子CR的储藏室,但星系团的非热强子伽马射线发射(主要是由于pp碰撞和随后的π衰变)尚未被探测到。在这项工作中,我们模拟了大力神星团(A2151)主要部分的预期非热强子伽马射线和中微子发射,并估计了现有(费米LAT、LHASSO、IceCube)和计划中(CTA、IceCube-Gen2)地基和天基探测器对该发射的探测前景。
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来源期刊
Advances in Astronomy and Space Physics
Advances in Astronomy and Space Physics ASTRONOMY & ASTROPHYSICS-
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