Primordial Black Holes as Dark Matter
Primordial Black Holes as Dark Matter
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DOI：
10.1007/978-3-642-56643-1_27
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
K. Jedamzik
中科院分区：
文献类型：
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作者：
K. Jedamzik
原始黑洞（PBH）可能很容易形成在宇宙的辐射占主导地位的阶段，从引力坍缩的视界大小的能量密度波动的中等幅度。PBH的形成是特别有效的宇宙QCD过渡期间，由于一般的压力下降。这使得原始黑洞质量函数的峰值接近QCD视界标度Mh~ 2 M <$（Tc/100 MeV）-2，其中Tc是宇宙QCD相变温度。这样形成的PBH是一个可行的冷暗物质候选者，并可能提供一个解释的微透镜调查的结果，如执行的CNOMO和EROS合作，一小部分的星系晕暗物质可能是在紧凑的大质量物体的形式。很有可能是，OOO和EROS只探测到了PBH群体的低质量尾部，该群体由质量函数超过Mbh> 2 M Ω的暗物质组成。讨论了宇宙太阳质量PBH暗物质的观测特征和约束。
Primordial black holes (PBHs) may readily form during the radiation dominated stages of the universe from the gravitational collapse of horizon-size energy density fluctuations of moderate amplitude. PBH formation is particularly efficient during a cosmic QCD transition, due to a generic decrease in pressure forces. This allows for a primordial black hole mass function which is peaked close to the QCD horizon scale,Mh~ 2M⊙(Tc/100MeV)–2, whereTcis the cosmic QCD phase transition temperature. Such formed PBHs are a viable cold dark matter candidate and may offer an explanation for the results of microlensing surveys, as performed by the MACHO and EROS collaborations, that a fraction of the galactic halo dark matter may be in form of compact massive objects. It may well be that MACHO and EROS have only detected the low-mass tail of a PBH population comprising the dark matter with a mass function extending beyondMbh> 2M⊙. Observational signatures and constraints of cosmic solar mass PBH dark matter are discussed.