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arXiv 1111.3868astro-ph.HE
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来自M87的暗物质湮灭的限制:瞬发和逆康普顿伽马射线的特征

Constraints on dark matter annihilation from M87: Signatures of prompt and inverse-Compton gamma rays

Sheetal Saxena, Alexander Summa, Dominik Elsässer, Michael Rüger, Karl Mannheim

摘要:

邻近星系团及其中心星系是本域宇宙中最大的质量集中区,是寻找暗物质湮灭(DMA)间接特征的主要目标。我们试图限制暗物质湮灭发射分量的多频观测的中央星系的室女星系团。湮灭发射分量由来自一般弱相互作用暗物质粒子的湮灭产物的强子化的即时和逆康普顿伽马射线建模。该分量被拟合到超过M87中喷流的光谱能量分布(SED)的观测数据,用最佳拟合的同步加速器自康普顿(SSC)光谱描述。虽然这一结果并不足以显著声称检测,我们强调,暗物质“双峰签名”可以用来明确区分暗物质的排放成分从可变喷流相关的M87在未来的观测活动,更广泛的。

英文摘要:

As the largest mass concentrations in the local Universe, nearby clusters of galaxies and their central galaxies are prime targets in searching for indirect signatures of dark matter annihilation (DMA). We seek to constrain the dark matter annihilation emission component from multi-frequency observations of the central galaxy of the Virgo cluster. The annihilation emission component is modeled by the prompt and inverse-Compton gamma rays from the hadronization of annihilation products from generic weakly interacting dark matter particles. This component is fitted to the excess of the observed data above the spectral energy distribution (SED) of the jet in M87, described with a best-fit synchrotron-self-Compton (SSC) spectrum. While this result is not sufficiently significant to claim a detection, we emphasize that a dark matter "double hump signature" can be used to unambiguously discriminate the dark matter emission component from the variable jet-related emission of M87 in future, more extended observation campaigns.

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