Astrophysical uncertainties on the local dark matter distribution and direct detection experiments
Astrophysical uncertainties on the local dark matter distribution and direct detection experiments
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DOI：
10.1088/1361-6471/aa7819
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
A. Green
中科院分区：
文献类型：
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作者：
A. Green
弱相互作用大质量粒子（WIMP）直接探测实验中的微分事件率依赖于局域暗物质密度和速度分布。因此，需要对当地暗物质分布进行精确建模，以获得对WIMP粒子物理性质的可靠约束。数据分析通常使用一个简单的标准晕模型，这可能不是一个很好的近似真实的银河系（MW）晕。本文综述了对类MW星系中局域暗物质密度、圆速度和逃逸速度的观测测定，以及模拟类MW星系中局域暗物质分布的研究。我们讨论了这些量的不确定性对能谱及其时间和方向依赖性的影响。最后，我们总结了处理这些天体物理不确定性的各种方法。
The differential event rate in weakly interacting massive particle (WIMP) direct detection experiments depends on the local dark matter density and velocity distribution. Accurate modelling of the local dark matter distribution is therefore required to obtain reliable constraints on the WIMP particle physics properties. Data analyses typically use a simple standard halo model which might not be a good approximation to the real Milky Way (MW) halo. We review observational determinations of the local dark matter density, circular speed and escape speed and also studies of the local dark matter distribution in simulated MW-like galaxies. We discuss the effects of the uncertainties in these quantities on the energy spectrum and its time and direction dependence. Finally, we conclude with an overview of various methods for handling these astrophysical uncertainties.