论文标题
使用暗物质子结构来限制原始曲率扰动
Constraining the primordial curvature perturbation using dark matter substructure
论文作者
论文摘要
我们通过观察暗物质亚结构来研究原始曲率扰动。假设在k> 1 Mpc^{ - 1}的波数中曲率扰动的频谱中有凸起，我们以半分析的方式跟踪宿主晕和Subhalos的演变。考虑到评估潮汐剥离影响次何洛生长的可能不确定性，我们发现了一种在曲率扰动上的新稳健结合，而在我们的星系中观察到的矮人球星系的数量和恒星流的迷恋中遇到了颠簸。对于k〜10^3 mpc^{ - 1}的凸起幅度的上限为O（10^{ - 7}）。此外，由于在当前观察界中允许的凸起，我们发现的增强因子对于间接检测暗物质信号至关重要，最大为O（10^4）。
We investigate the primordial curvature perturbation by the observation of dark matter substructure. Assuming a bump in the spectrum of the curvature perturbation in the wavenumber of k>1 Mpc^{-1}, we track the evolution of the host halo and subhalos in a semi-analytic way. Taking into account possible uncertainties in the evaluation of the tidal stripping effect on the subhalo growth, we find a new robust bound on the curvature perturbation with a bump from the number of observed dwarf spheroidal galaxies in our Galaxy and the observations of the stellar stream. The upper limit on the amplitude of the bump is O(10^{-7}) for k~10^3 Mpc^{-1}. Furthermore we find the boost factor, which is crucial for the indirect detection of dark matter signals, is up to O(10^4) due to the bump that is allowed in the current observational bounds.
