Probing dark matter with active galactic nuclei jets
Probing dark matter with active galactic nuclei jets
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用活跃的星系核喷流探测暗物质
DOI：
10.1103/physrevd.82.083514
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发表时间：
2010
影响因子：
5
通讯作者：
Lorenzo Ubaldi
中科院分区：
文献类型：
--
作者：
M. Gorchtein;S. Profumo;Lorenzo Ubaldi
我们研究的可能性检测的签名粒子暗物质的伽马射线光子从活动星系核（AGN）的光谱中产生的高能粒子的散射活动星系核喷流关闭的暗物质粒子。我们认为粒子暗物质模型的背景下，超对称性和普遍的额外的维度，我们提出了完整的最低阶计算过程中发出的光子在暗物质-电子和/或暗物质-质子散射，其中电子和质子属于活动星系核喷流。我们发现，该过程是由共振的能量是由暗物质部门的粒子光谱（中性伴子和selectron的情况下的超对称，卡鲁扎-克莱因光子和电子的普遍额外的维度）。由此产生的伽马射线光谱表现出非常典型的光谱特征，包括对硬幂律行为的急剧突破。虽然γ射线通量的归一化强烈依赖于对活动星系核喷流几何形状、成分和粒子谱以及粒子暗物质模型和密度分布的假设，但我们表明，对于现实的参数选择，以及两个突出的邻近活动星系核（半人马座A和M87），检测thismore效应原则上是可能的。最后，我们将我们的预测和结果与费米，H.E.S.S.，和VERITAS望远镜«少
We study the possibility of detecting a signature of particle dark matter in the spectrum of gamma-ray photons from active galactic nuclei (AGNs) resulting from the scattering of high-energy particles in the AGN jet off of dark matter particles. We consider particle dark matter models in the context of both supersymmetry and universal extra dimensions , and we present the complete lowest-order calculation for processes where a photon is emitted in dark matter-electron and/or dark matter-proton scattering, where electrons and protons belong to the AGN jet. We find that the process is dominated by a resonance whose energy is dictated by the particle spectrum in the dark matter sector (neutralino and selectron for the case of supersymmetry, Kaluza-Klein photon and electron for universal extra dimensions ). The resulting gamma-ray spectrum exhibits a very characteristic spectral feature, consisting of a sharp break to a hard power-law behavior. Although the normalization of the gamma-ray flux depends strongly on assumptions on both the AGN jet geometry, composition and particle spectrum as well as on the particle dark matter model and density distribution, we show that for realistic parameters choices, and for two prominent nearby AGNs (Centaurus A and M87), the detection of thismore » effect is in principle possible. Finally, we compare our predictions and results with recent gamma-ray observations from the Fermi, H.E.S.S., and VERITAS telescopes.« less