Diffuse Gamma Ray Background from Annihilating Dark Matter in Density Spikes around Supermassive Black Holes
Diffuse Gamma Ray Background from Annihilating Dark Matter in Density Spikes around Supermassive Black Holes
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超大质量黑洞周围密度尖峰中消灭暗物质的漫射伽马射线背景
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发表时间：
2013
期刊：
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通讯作者：
J. Silk
中科院分区：
文献类型：
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作者：
A. Belikov;J. Silk
暗物质湮灭与密度的平方成正比，并且在暗物质浓度最高的地方特别有效，例如暗物质尖峰。尖峰的形成是由于在暗物质晕或次晕中心的超大质量黑洞的绝热生长引起的暗物质密度轮廓的收缩。我们重新审视暗物质晕和尖峰的性质和质量函数之间的关系，并提出了密度尖峰的替代模型，可能有助于各向同性的伽马射线背景。
Dark matter annihilation is proportional to the square of the density and is especially efficient in places of highest concentration of dark matter, such as dark matter spikes. The spikes are formed as a result of contraction of the dark matter density profile caused by adiabatic growth of a supermassive black hole at the center of the dark matter halo or subhalo. We revisit the relation between the properties and mass functions of dark matter halos and spikes, and propose alternative models for the density spikes that can potentially contribute to the isotropic gamma-ray background.