2020/04/27 by Q. Wu, H. Yu, Hai Yu +1
Physics and Astronomy · #Consistency (knowledge bases) #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Hubble volume #Hubble's law #Measure (data warehouse) #Monte Carlo method #Observational cosmology #Pulsars and Gravitational Waves Research #Redshift #astro-ph.CO #astro-ph.HE
paper · pdf · doi:10.3847/1538-4357/ab88d2
10 pages, 4 figures, accepted for publication in ApJ
arxiv created 2020/04/27 · openalex publication_date 2020/05/01 · arxiv updated 2020/05/27 · openalex created_date 2020/05/29 · openalex updated_date 2026/08/05
Abstract The Hubble parameter H ( z ) is directly related to the expansion of our universe. It can be used to study dark energy and constrain cosmology models. In this paper, we propose that H ( z ) can be measured using fast radio bursts (FRBs) with redshift measurements. We use dispersion measures contributed by the intergalactic medium, which is related to H ( z ), to measure the Hubble parameter. We find that 500 mocked FRBs with dispersion measures and redshift information can accurately measure Hubble parameters using Monte Carlo simulation. The maximum deviation of H ( z ) from the standard ΛCDM model is about 6% at redshift z = 2.4. We also test our method using Monte Carlo simulation. A Kolmogorov–Smirnov (K-S) test is used to check the simulation. The p -value of the K-S test is 0.23, which confirms internal consistency of the simulation. In the future, more localizations of FRBs make it an attractive cosmological probe.