论文标题
Nanograv在行星质量原始黑洞上提示
NANOGrav Hints on Planet-Mass Primordial Black Holes
论文作者
论文摘要
最近，北美纳米赫兹引力波（Nanograv）声称发现了脉冲星计时阵列（PTA）时间残差的随机常见过程，从其12。5年的数据中发现，这可能是重力波的随机背景（GWS）的首次检测（GWS）。我们表明，这种波的幅度和功率指数表明它们可能是由峰值曲率扰动引起的次级GW，具有灰尘后的通货膨胀时代，$ -0.091 \ lessim w \ lyssim w \ lyssim0.048 $。 GWS的这种随机背景自然预测了行星质原始黑洞（PBHS）的实质存在，这可能是通过光学重力透镜实验（OGLE）观察到的超时性微量微化事件的镜头对象。
Recently, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) claimed the detection of a stochastic common-spectrum process of the pulsar timing array (PTA) time residuals from their 12.5 year data, which might be the first detection of the stochastic background of gravitational waves (GWs). We show that the amplitude and the power index of such waves imply that they could be the secondary GWs induced by the peaked curvature perturbation with a dust-like post inflationary era with $-0.091\lesssim w\lesssim0.048$. Such stochastic background of GWs naturally predicts substantial existence of planet-mass primordial black holes (PBHs), which can be the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment (OGLE).
