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What it takes to measure reionization with fast radio bursts
TLDR
In this article, the authors used high redshift fast radio bursts (FRBs) to constrain the history of hydrogen reionization and measure the reionisation optical depth τ.Abstract:
Fast radio bursts (FRBs) are extra-galactic radio transients which, owing to the observed dispersion of the signal, can be used as cosmological probes. In this Letter we use high redshift FRBs to constrain the history of hydrogen reionization and measure the reionization optical depth τ. For the first time, we do so in a model-independent way by using a free-form parameterization of the reionization history. In a Bayesian analysis we find that 100 localized FRBs, produced during the first billion years of cosmic history (redshifts z>5), are required to surpass the measurement by the Planck satellite, constraining τ to an accuracy of 11% (at 68% confidence) and the midpoint of reionization to 6%, while 1000 FRBs would further tighten these constraints to 9% and 3% accuracy respectively.read more
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Cosmological-model-independent Determination of Hubble Constant from Fast Radio Bursts and Hubble Parameter Measurements
Yang Liu,Hongwei Yu,Puxun Wu +2 more
TL;DR: In this article , the authors established a cosmological-model-independent method to determine the Hubble constant H 0 from the localized fast radio bursts (FRBs) and the Hubble parameter measurements from cosmic chronometers and obtained a first such determination H 0 = 71 ± 3 km s−1 Mpc−1, with an uncertainty of 4%, from the eighteen localized FRBs and nineteen Hubble parameters in the redshift range 0 < z ≤ 0.66.
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A short introduction to reionization physics
TL;DR: The epoch of reionization probes the state of our universe when the very first stars formed and ionized the hydrogen atoms in the surrounding medium as discussed by the authors , and it is often called the “final frontier of observational cosmology.
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Future of Neutron Star Studies with Fast Radio Bursts
Sergei Popov,Maxim Pshirkov +1 more
TL;DR: In this paper , the authors discuss the main directions of such future studies and summarize the present knowledge about fast radio bursts and their sources, and summarize their past knowledge about FRBs.
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Solar System-scale Interferometry on Fast Radio Bursts Could Measure Cosmic Distances with Subpercent Precision
K. Boone,Matthew McQuinn +1 more
TL;DR: In this paper , the authors showed that a four-detector constellation at solar radii of ≳10 au could measure geometric distances to individual sources with sub-percent precision, and the precision increases quadratically with baseline length.
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