论文标题
与快速无线电爆发观测的紧凑型暗物质的限制
Constraints on compact dark matter with fast radio burst observations
论文作者
论文摘要
快速无线电爆发（FRB）是明亮的无线电瞬变，在宇宙学距离处持续毫秒。由于紧凑的暗物质/对象（cos）可以充当镜头并导致这种非常短的持续时间信号的拆分，因此mu $ \ rm {\ tilde {n}} $ oz等人。 （2016年）提出了一种新的方法，可以用FRB镜头探测COS。在这封信中，我们首次将此方法应用于真实数据，并以当前可用的FRB观测值给出了COS性质的约束。我们强调来自FRB的动态光谱的信息对于识别任何镜头信号而在现有数据中找不到回声是必不可少的。零搜索给出了与银河宽二进制文件相当的约束，尽管分散度量的红移方法会影响一点。此外，我们基于正在进行的和即将到来的望远镜的真实数据的分布进行了改进的预测。最后，我们讨论将检测到一个或多个镜头信号的情况。在这种情况下，可以很好地固定COS的参数空间，因为可以通过观察到的通量比和分裂图像之间的时间延迟直接确定镜头质量。
Fast Radio Bursts (FRBs) are bright radio transients with millisecond duration at cosmological distances. Since compact dark matter/objects (COs) could act as lenses and cause split of this kind of very short duration signals, Mu$\rm{\tilde{n}}$oz et al. (2016) has proposed a novel method to probe COs with lensing of FRBs. In this Letter, we for the first time apply this method to real data and give constraints of the nature of COs with currently available FRB observations. We emphasize the information from dynamic spectra of FRBs is quite necessary for identifying any lensed signals and find no echoes in the existing data. The null search gives a constraint comparable to that from galactic wide binaries, though the methods of redshift inference from dispersion measure would impact a little. Furthermore, we make an improved forecast basing on the distributions of real data for the ongoing and upcoming telescopes. Finally, we discuss the situation where one or more lensed signals will be detected. In such a case, the parameter space of COs can be pinned down very well since the lens mass can be directly determined through the observed flux ratio and time delay between split images.
