论文标题
原始黑洞的辐射对黑暗时代的21厘米角动力光谱的影响
Impact of radiation from primordial black holes on the 21-cm angular-power spectrum in the dark ages
论文作者
论文摘要
我们研究了原始黑洞（PBH）辐射的影响，质量为$ 10^{15} \ Lessim M _ {\ rm pbh} \ sillsim 10^{17}〜\ rm g $和$ 10^{2} {2} \ simes m _ {2} \ sims m _ { 10^{4} 〜m _ {\ odot} $，在黑暗时代的21厘米角启动频谱上。前者质量范围中的PBHS通过称为鹰辐射的蒸发量21厘米角动力频谱，而后者质量范围内的积聚过程的辐射。在黑暗时代，来自PBH的辐射可以增加播层间介质的电离分数和温度，改变全局21厘米的差异亮度温度，然后影响21厘米的角驱动频谱。考虑到PBH的影响，我们发现在黑暗时代，$ 30 \ lyssim z \ Lessim 100 $，根据PBH的质量和质量分数，降低了21厘米角动力频谱的幅度。我们还研究了PBHS的质量分数的潜在限制，以暗物质的形式为Lunar obit或月球远处的未来射电望远镜的未来射电望远镜。
We investigate the impact of radiation from primordial black holes (PBHs), in the mass range of $10^{15} \lesssim M_{\rm PBH} \lesssim 10^{17}~\rm g$ and $10^{2} \lesssim M_{\rm PBH} \lesssim 10^{4}~M_{\odot}$, on the 21-cm angular-power spectrum in the dark ages. PBHs in the former mass range effect the 21-cm angular-power spectrum through the evaporation known as Hawking radiation, while the radiation from the accretion process in the latter mass range. In the dark ages, radiation from PBHs can increase the ionization fraction and temperature of the intergalactic medium, change the global 21-cm differential brightness temperature and then effect the 21-cm angular-power spectrum. Taking into account the effects of PBHs, we find that in the dark ages, $30 \lesssim z \lesssim 100$, the amplitude of the 21-cm angular-power spectrum is decreased depending on the mass and mass fraction of PBHs. We also investigate the potential constraints on the mass fraction of PBHs in the form of dark matter for the future radio telescope in lunar obit or on the farside surface of the Moon.
