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arXiv 0810.0692astro-ph
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星系团的非热辐射和用FERMI gamma-ray望远镜和LOFAR的未来观测

Non-thermal emission from Galaxy Clusters and future observations with the FERMI gamma-ray telescope and LOFAR

G. Brunetti

摘要:

FERMI(以前称为GLAST)和LOFAR将很快提供关于星系团中非热成分(相对论粒子和磁场)的关键信息。在讨论了已经对非热成分的性质和起源提出限制的观测事实之后,我将报告在一般计算的背景下预期的星系团的发射光谱,其中相对论粒子(质子和质子-质子碰撞产生的次级电子)与在团簇合并过程中在团簇体积中产生的MHD湍流相互作用。在这种情况下(被称为再加速的情况下),弥漫集群规模的无线电发射产生在大规模的集群合并过程中的事件,而伽马射线发射,在某种程度上,预计将是常见的集群。还简要讨论了对LOFAR和FERMI感兴趣的期望。

英文摘要:

FERMI (formely GLAST) and LOFAR will shortly provide crucial information on the non-thermal components (relativistic particles and magnetic field) in galaxy clusters. After discussing observational facts that already put constraints on the properties and origin of non-thermal components, I will report on the emission spectrum from galaxy clusters as expected in the context of general calculations in which relativistic particles (protons and secondary electrons due to proton-proton collisions) interact with MHD turbulence generated in the cluster volume during cluster-cluster mergers. In this scenario (known as re-acceleration scenario) diffuse cluster-scale radio emission is produced in massive clusters during merging events, while gamma ray emission, at some level, is expected to be common in clusters. Expectations of interest for LOFAR and FERMI are also briefly discussed.

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。

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