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arXiv 0806.2981astro-ph
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用H.E.S.S.搜寻中等质量黑洞周围暗物质湮灭产生的γ射线实验

Search for Gamma-rays from Dark Matter annihilations around Intermediate Mass Black Holes with the H.E.S.S. experiment

HESS Collaboration, F Aharonian, G. Bertone

摘要:

H.E.S.S.从2004年到2007年,Cherenkov望远镜阵列在光子能量超过100 GeV的情况下对银河系内平面进行了调查。在银河经度-30度到+60度之间,银河纬度-3度到+3度之间的区域,已经积累了大约400小时的数据。假设暗物质是由弱相互作用的大质量粒子组成的,我们在这里计算H.E.S.S.灵敏度图的暗物质湮灭,并推导出第一个实验约束的“迷你尖峰”的情况下,伽马射线信号产生于暗物质湮灭周围的中等质量黑洞。对于速度加权湮灭截面σ v大于10 ^28 cm 3 s ^-1、质量在800 GeV到10 TeV之间的暗物质粒子,在90%的置信水平下,这些数据排除了上述假设。

英文摘要:

The H.E.S.S. array of Cherenkov telescopes has performed, from 2004 to 2007, a survey of the inner Galactic plane at photon energies above 100 GeV. About 400 hours of data have been accumulated in the region between -30 and +60 degrees in Galactic longitude, and between -3 and +3 degrees in Galactic latitude. Assuming that dark matter is composed of Weakly Interacting Massive Particles, we calculate here the H.E.S.S. sensitivity map for dark matter annihilations, and derive the first experimental constraints on the ''mini-spikes'' scenario, in which a gamma-ray signal arises from dark matter annihilation around Intermediate Mass Black Holes. The data exclude the proposed scenario at a 90% confidence level for dark matter particles with velocity-weighted annihilation cross section sigma v above 10^28 cm3s^-1 and mass between 800 GeV and 10 TeV.

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