利用CHIME/FRB的快速射电暴引力透镜干涉测量约束原初黑洞
高能天体物理现象
2022-08-31 v1 宇宙学与河外天体物理
摘要
快速射电暴(FRBs)因其亮度、河外起源以及发射的致密相干特性,代表了引力透镜研究的一个令人兴奋的前沿。在 companion work [Kader, Leung+2022]中,我们采用一种新颖的干涉方法,利用CHIME/FRB探测到的暴在时域搜索引力透镜化的FRB。在那里,我们以1.25 ns的时间分辨率对电场数据去信道化并自相关。这使得搜索被前景致密天体(如原初黑洞(PBH))周围引力透镜相干偏折的FRB成为可能。在此,我们利用未探测到透镜化FRB这一结果,对本地群之外的PBH丰度给出新的约束。我们采用一种新颖的双屏模型,在约束中考虑来自散射屏的去相干效应。我们的约束依赖于单一天体物理模型参数——FRB源与散射屏之间的有效距离,我们采用1秒差距的基准距离。我们发现相干FRB透镜是亚太阳质量致密天体的灵敏探针。在穿过宇宙网的114条独立视线中对个暴未观测到透镜,我们约束由致密天体(如PBH)构成的暗物质比例为(若其质量为)。
引用
@article{arxiv.2204.06001,
title = {Constraining Primordial Black Holes using Fast Radio Burst Gravitational-Lens Interferometry with CHIME/FRB},
author = {Calvin Leung and Zarif Kader and Kiyoshi W. Masui and Matt Dobbs and Daniele Michilli and Juan Mena-Parra and Ryan Mckinven and Cherry Ng and Kevin Bandura and Mohit Bhardwaj and Charanjot Brar and Tomas Cassanelli and Pragya Chawla and Fengqiu Adam Dong and Deborah Good and Victoria Kaspi and Adam E. Lanman and Hsiu-Hsien Lin and Bradley W. Meyers and Aaron B. Pearlman and Ue-Li Pen and Emily Petroff and Ziggy Pleunis and Masoud Rafiei-Ravandi and Mubdi Rahman and Pranav Sanghavi and Paul Scholz and Kaitlyn Shin and Seth Siegel and Kendrick M. Smith and Ingrid Stairs and Shriharsh P. Tendulkar and Keith Vanderlinde},
journal= {arXiv preprint arXiv:2204.06001},
year = {2022}
}
备注
20 pages, 5 figures