由两例引力透镜的角直径距离对哈勃常数的测量
宇宙学与河外天体物理
2019-09-17 v1
摘要
宇宙局域膨胀率由哈勃常数参数化，即退行速度与距离之比。不同技术导致对不一致的估计。Ia型超新星(SNe)的观测可用于测量，但这需要外部校准器将相对距离转换为绝对距离。我们使用强引力透镜的角直径距离作为合适的校准器，其对宇宙学假设仅弱敏感。我们确定了两例引力透镜在红移与处的角直径距离，分别为与~Mpc。利用这些绝对距离校准先前测得的740个SNe相对距离，我们测得哈勃常数为。
引用
@article{arxiv.1909.06712,
title = {A measurement of the Hubble constant from angular diameter distances to two gravitational lenses},
author = {Inh Jee and Sherry Suyu and Eiichiro Komatsu and Christopher D. Fassnacht and Stefan Hilbert and Léon V. E. Koopmans},
journal= {arXiv preprint arXiv:1909.06712},
year = {2019}
}
备注
This paper presents the measurements of angular diameter distances to two time-delay lenses, and the Hubble constant derived only from these two distances and the JLA supernova sample. One of the distance measurements is further used for the cosmological inference in the H0LiCOW XIII paper (arxiv:1907.04869). Published in Science