银河系中心MSSM暗物质解与网状II gamma-ray数据的比较
Comparing Galactic Center MSSM dark matter solutions to the Reticulum II gamma-ray data
摘要：
费米大天区望远镜（LAT）的观测表明，可能有一个小光子信号来自矮星系网囊II，超过了2 GeV和10 GeV之间的预期背景。我们已经调查了两个具体的情况下湮灭WIMP暗物质的现象最小超对称标准模型（pMSSM）的框架内作为这些光子的可能来源。我们发现，在pMSSM中的参数范围与先前的论文中报道的银河系中心过剩一致，也与在网状II中观察到的过剩一致，导致J因子为$\log_{10}(J(α_{int}=0.5 deg)) \simeq (20.3-20.5)^{+0.2}_{-0.3}$。这个J因子与$\log_{10}(J(α_{int}=0.5 deg)) = 19.5^{+1.0}_{-0.6}$ GeV $^2$ cm $^{-5}$是一致的，它是使用从密歇根/麦哲伦光纤系统（M2 FS）获得的运动学数据的优化球形Jeans分析得出的。
英文摘要：
Observations with the Fermi Large Area Telescope (LAT) indicate a possible small photon signal originating from the dwarf galaxy Reticulum II that exceeds the expected background between 2 GeV and 10 GeV. We have investigated two specific scenarios for annihilating WIMP dark matter within the phenomenological Minimal Supersymmetric Standard Model (pMSSM) framework as a possible source for these photons. We find that the same parameter ranges in pMSSM as reported by an earlier paper to be consistent with the Galactic center excess, is also consistent with the excess observed in Reticulum II, resulting in a J-factor of $\log_{10}(J(α_{int}=0.5 deg)) \simeq (20.3-20.5)^{+0.2}_{-0.3}$. This J-factor is consistent with $\log_{10}(J(α_{int}=0.5 deg)) = 19.5^{+1.0}_{-0.6}$ GeV$^2$cm$^{-5}$, which is derived using an optimized spherical Jeans analysis of kinematic data obtained from the Michigan/Magellan Fiber System (M2FS).
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