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arXiv 1206.1607astro-ph.HEastro-ph.GAhep-ph
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寻找高能中微子对应信号;费米泡信号和银河系内部暗物质湮灭的情况

Searching for High Energy Neutrino counterpart signals; The case of the Fermi Bubbles signal and of Dark Matter annihilation in the inner Galaxy

Ilias Cholis

摘要:

最近在\textit{Fermi}伽马射线数据中发现的\textit{Fermi}气泡/雾状物已经产生了理论工作来解释这种硬$γ$射线信号与\textit{WMAP}雾状物信号的组合。这些理论模型中的许多可能对高能中微子的产生有着截然不同的影响。我们讨论了中微子信号从不同的模型提出的解释\textit{Fermi}泡沫/阴霾,更明确地说,从暗物质湮灭在星系晕的条件下优先CR扩散,从最近的活动星系核喷流活动,从周期性的扩散冲击加速,从随机的二阶费米加速和从长时间尺度的恒星形成在银河系中心结合强星系风。我们发现其中一些模型将被IceCube DeepCore探测器探测。此外,在北半球安装一个km的$^3$望远镜,我们将能够区分强子、轻子和DM模型。此外,利用重建的中微子光谱,我们将探测TeV尺度的暗物质对银河系中心的湮灭。

英文摘要:

The recent uncovering of the \textit{Fermi} Bubbles/haze in the \textit{Fermi} gamma-ray data has generated theoretical work to explain such a signal of hard $γ$-rays in combination with the \textit{WMAP} haze signal. Many of these theoretical models can have distinctively different implications with regards to the production of high energy neutrinos. We discuss the neutrino signals from different models proposed for the explanation of the \textit{Fermi} Bubbles/haze, more explicitly, from Dark Matter annihilation in the galactic halo with conditions of preferential CR diffusion, from recent AGN jet activity, from periodic diffusive shock acceleration, from stochastic 2nd order Fermi acceleration and from long time-scale star formation in the galactic center in combination with strong galactic winds. We find that some of these models will be probed by the IceCube DeepCore detector. Moreover, with a km$^3$ telescope located at the north hemisphere, we will be able to discriminate between the hadronic, leptonic and the DM models. Additionally using the reconstructed neutrino spectra we will probe annihilation of TeV scale dark matter towards the galactic center.

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