标题： 向更现实的超致密暗物质晕质量函数迈进 显示英文标题

标题： Toward More Realistic Mass Functions For Ultradense Dark Matter Halos

摘要： 超致密暗物质晕（UDMHs）是暗物质的高浓度区域，假设它们是从增强的原初扰动形成的，同时还有原初黑洞（PBHs）。 在本工作中，我们计算了UDMHs的丰度，并通过在分析中包括各种物理和几何修正来改进之前的工作。 特别是，我们研究了角动量、动力学摩擦和三轴坍缩对UDMHs预测质量函数的影响。 我们对四种具有不同增强特征的原初功率谱进行了计算，这些特征允许在广泛的质量范围内形成（PBH和）UDMHs。 我们发现，在这些更现实的物理修正存在的情况下，UDMHs的丰度显著增强。 将结果与当前对PBHs的观测限制进行比较也表明，UDMHs预计在广泛的质量区间内将显著多于PBHs，具体细节取决于原初功率谱。 显示英文摘要

摘要： Ultradense dark matter halos (UDMHs) are high concentrations of dark matter which are assumed to have formed from amplified primordial perturbations, alongside the primordial black holes (PBHs). In this work we calculate the abundance of UDMHs and improve the previous works by elaborating on the formation process of these halos through including various physical and geometrical modifications in the analysis. In particular, we investigate the impact of angular momentum, dynamical friction and triaxial collapse on the predicted mass functions for UDMHs. We perform the calculations for four primordial power spectra with different amplified features that allow for (PBH and) UDHM formation in a wide mass range. We find that the abundance of UDMHs is prominently enhanced in the presence of these more realistic physical modifications. Comparison of the results with the current observational bounds on PBHs also implies that the UDMHs are expected to significantly outnumber PBHs in broad mass intervals, with the details depending on the primordial power spectrum.