Probing the Cosmic Ray Population of the Giant Elliptical Galaxy M 87 with Observed TeV Gamma-Rays
Probing the Cosmic Ray Population of the Giant Elliptical Galaxy M 87 with Observed TeV Gamma-Rays
复制标题
用观测到的 TeV 伽马射线探测巨型椭圆星系 M 87 的宇宙射线群
DOI：
10.1051/0004-6361:20031088
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发表时间：
2003
影响因子：
6.5
通讯作者：
T. Ensslin
中科院分区：
文献类型：
--
作者：
C. Pfrommer;T. Ensslin
我们使用HEGRA合作的TeVγ-射线探测器检查了巨型椭圆星系M87中的宇宙射线质子(CRP)数量。在我们的场景中，γ射线是由衰变的PERE产生的，而衰变的PIRE是由强子C反应蛋白与M87星际介质的热气体相互作用产生的。通过将γ射线发射与白鹭的上限进行比较，我们将C反应蛋白种群的光谱指数限制在αT e V Gev<；2.275。预期的径向γ射线分布和所需的CRP量都支持这种强子情景。伴随着强子起源的宇宙线电子的射电迷你光晕，被M87的相对论喷流的同步辐射掩盖了一个数量级。根据我们的预测，未来的GLAST任务应该允许我们测试这个强子场景。
We examine the cosmic ray proton (CRp) population within the giant elliptical galaxy M 87 using the TeV γ-ray detection of the HEGRA collaboration. In our scenario the γ-rays are produced by decaying pious which result from hadronic CRp interactions with thermal gas of the interstellar medium of M 87. By comparing the γ-ray emission to upper limits from EGRET, we constrain the spectral index of the CRp population to α T e V GeV < 2.275 within our scenario. Both the expected radial γ-ray profile and the required amount of CRp support this hadronic scenario. The accompanying radio mini-halo of hadronically originating cosmic ray electrons is outshone by the synchrotron emission of the relativistic jet of M 87 by one order of magnitude. According to our predictions, the future GLAST mission should allow us to test this hadronic scenario.