Neutrino point source searches for dark matter spikes
Neutrino point source searches for dark matter spikes
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DOI：
10.1088/1475-7516/2022/08/065
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发表时间：
2022-02
影响因子：
6.4
通讯作者：
K. Freese;Irina Galstyan;Pearl Sandick;Patrick Stengel
中科院分区：
文献类型：
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作者：
K. Freese;Irina Galstyan;Pearl Sandick;Patrick Stengel
我们银河系中黑洞周围的任何暗物质尖峰都是重要的暗物质湮灭地点，导致了潜在的可检测到的中微子信号。在这篇文章中，我们研究了与暗物质尖峰有关的10-105M⊙黑洞，这些黑洞形成于早期的迷你晕中，今天仍然存在于我们的银河系中，根据来自心宿二星[1]和冰立方[2]探测器的中微子数据。在天空的不同区域，我们确定了暗物质尖峰必须距离太阳系的最小距离，才能不被检测到作为各种典型暗物质湮灭通道的中微子点源。考虑到暗物质尖峰在银河系中分布的这些限制，我们对早期迷你晕中第一代恒星的形成施加了重大限制--比之前费米伽马射线空间望远镜数据中伽马射线搜索的限制更强。文中所讨论的较大黑洞可能是暗物质燃料耗尽后暗星的残余物而产生的，因此中微子观测可以用来限制暗星的性质。对于较重的WIMP来说，这些限制尤其强烈。对于WIMP质量∼5TeV，我们发现≲10%的迷你晕可以容纳坍塌成大于103M⊙的BHS的首批恒星。
Any dark matter spikes surrounding black holes in our Galaxy are sites of significant dark matter annihilation, leading to a potentially detectable neutrino signal. In this paper we examine 10 - 105 M ⊙ black holes associated with dark matter spikes that formed in early minihalos and still exist in our Milky Way Galaxy today, in light of neutrino data from the ANTARES [1] and IceCube [2] detectors. In various regions of the sky, we determine the minimum distance away from the solar system that a dark matter spike must be in order to have not been detected as a neutrino point source for a variety of representative dark matter annihilation channels. Given these constraints on the distribution of dark matter spikes in the Galaxy, we place significant limits on the formation of the first generation of stars in early minihalos — stronger than previous limits from gamma-ray searches in Fermi Gamma-Ray Space Telescope data. The larger black holes considered in this paper may arise as the remnants of Dark Stars after the dark matter fuel is exhausted; thus neutrino observations may be used to constrain the properties of Dark Stars. The limits are particularly strong for heavier WIMPs. For WIMP masses ∼ 5TeV, we show that ≲ 10 % of minihalos can host first stars that collapse into BHs larger than 103 M ⊙.