不稳定暗物质中逆康普顿过程的宇宙Gamma-ray
Cosmic Gamma-ray from Inverse Compton Process in Unstable Dark Matter Scenario
摘要:
受宇宙射线电子和正电子通量中PAMELA异常的启发,我们研究了不稳定暗物质中逆康普顿(IC)散射过程诱导的宇宙γ射线,假设这种异常是由于暗物质衰变产生的电子和正电子辐射所致.本文计算了银河系中的IC感应γ射线通量和从宇宙学距离计算的IC感应γ射线通量,表明两者都是有意义的。如果费米伽马射线太空望远镜能精确测定不同视线方向的伽马射线通量,这将为衰变暗物质的假设提供一个重要的检验。
英文摘要:
Motivated by the PAMELA anomaly in the fluxes of cosmic-ray electron and positron, we study the cosmic gamma-ray induced by the inverse Compton (IC) scattering process in unstable dark matter scenario assuming that the anomaly is due to the electron and positron emission by the decay of dark matter. We calculate the fluxes of IC-induced gamma-ray produced in our Galaxy and that from cosmological distance, and show that both of them are significant. If the gamma-ray flux is precisely determined by Fermi Gamma-ray Space Telescope for various line-of-sight directions, it will provide an important test of the decaying dark matter scenario.
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