论文标题
CMB光谱畸变的原始黑洞的限制
Constraints on primordial black holes with CMB spectral distortions
论文作者
论文摘要
在混合暗物质方案中，由原始黑洞（PBH）和弱相互作用的巨大颗粒（Wimps）组成，可以将wimps吸收到PBHS上，形成早期宇宙中密度峰值的超型Minihalos（UCMHS）。与经典的暗物质光环相比，UCMHS较早形成，并且中心密度更高。由于歼灭速率与wimps的平方数密度成正比，因此预计UCMHS内的wimps an灭会增强，并对早期宇宙产生影响。在重组和物质辐射平等的时间之间，将UCMHS内wim灭释放的能量注入了宇宙中，导致CMB $ y $ y $ type失真。我们研究了这些效果，并利用了远红外绝对分光光度计（FIRAS）的观察结果来获得对PBH的丰度的上限。我们发现，对于WIMPS质量范围$ 1 \ lem_χ\ le 1000〜 \ rm GEV $，PBHS丰度的上限为$ 5 \ times 10^{ - 3} \leΩ_{\ rm pbh} \ rm pbh}
In the mixed dark matter scenarios consisting of primordial black holes (PBHs) and weakly interacting massive particles (WIMPs), WIMPs can be accreted onto PBHs to form ultracompact minihalos (UCMHs) with a density spike in the early universe. Compared with the classical dark matter halo, UCMHs are formed earlier and have a higher density of center. Since the annihilation rate is proportional to the squared number density of WIMPs, it is expected that WIMPs annihilation within UCMHs is enhanced and has influences on the early universe. Between the time of recombination and matter-radiation equality, the energy released from WIMPs annihilation within UCMHs is injected into the Universe resulting in CMB $y$-type distortion. We investigate these effects and derive the upper limits on the abundance of PBHs taking advantage of the observational results of Far Infrared Absolute Spectrophotometer (FIRAS). We find that for the WIMPs mass range $1\le m_χ\le 1000~\rm GeV$, the upper limits on the abundance of PBHs are $5\times 10^{-3}\le Ω_{\rm PBH}\le 5\times 10^{-2}$.
