Dispersion Measures of Fast Radio Bursts through the Epoch of Reionization

Abstract

Dispersion measures (DM) of fast radio bursts (FRBs) probe the density of electrons in the intergalactic medium (IGM) along their lines-of-sight, including the average density versus distance to the source and its variations in direction. While previous study focused on low-redshift, FRBs are potentially detectable out to high redshift, where their DMs can, in principle, probe the epoch of reionization (EOR) and its patchiness. We present the first predictions from large-scale, radiation-hydrodynamical simulation of fully-coupled galaxy formation and reionization, using Cosmic Dawn (``CoDa")~II to model the density and ionization fields of the universe down to redshifts through the end of the EOR at $z_{re}\approx 6.1$. Combining this with an N-body simulation CoDa~II--Dark Matter of the fully-ionized epoch from the EOR to the present, we calculate the mean and standard deviation of FRB DMs as functions of their source redshift. The mean and standard deviation of DM increase with redshift, reaching a plateau by $z(x_{HII}\lesssim 0.25)\gtrsim 8$, i.e. well above $z_{re}$. The mean-DM asymptote ${\mathcal{D}\mathcal{M}}_{max}\approx 5900\mathrm{pc}\mathrm{c}{\mathrm{m}}^{-3}$ reflects the end of the EOR and its duration. The standard deviation there is ${\sigma }_{DM,max}\approx 497\mathrm{pc}\mathrm{c}{\mathrm{m}}^{-3}$, reflecting inhomogeneities of both patchy reionization and density. Inhomogeneities in ionization during the EOR contribute $\mathcal{O}(1$ per cent) of this value of ${\sigma }_{DM,max}$ from FRBs at redshifts $z\gtrsim 8$. Current estimates of FRB rates suggest this may be detectable within a few years of observation.

arXiv comment14 pages, 10 figures, 2 tables, 2 appendices

References in corpus (39)

• Planck 2013 results. XVI. Cosmological parameters
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• Fast Radio Bursts
• The Illustris Simulation: Public Data Release
• Fast Radio Bursts: An Extragalactic Enigma
• Locating the "missing" baryons with extragalactic dispersion measure estimates
• Fast radio burst source properties and curvature radiation model
• The Baryonic Assembly of Dark Matter Halos
• Cosmological implications of Fast Radio Burst / Gamma-Ray Burst Associations
• The z~6 Luminosity Function Fainter than -15 mag from the Hubble Frontier Fields: The Impact of Magnification Uncertainties
• The Extreme Faint End of the UV Luminosity Function at $z\sim 6$ Through Gravitational Telescopes: a comprehensive assessment of strong lensing uncertainties
• A concordance picture of FRB 121102 as a flaring magnetar embedded in a magnetized ion-electron wind nebula
• How Soft Gamma Repeaters May Make Fast Radio Bursts
• The onion universe: all sky lightcone simulations in spherical shells
• Repeating Fast Radio Bursts from Magnetars with Low Magnetospheric Twist
• Detecting the Rise and Fall of the First Stars by Their Impact on Cosmic Reionization
• FRB Coherent Emission from Decay of Alfven Waves
• Fast Radio Bursts and cosmological tests
• Intergalactic medium dispersion measures of fast radio bursts estimated from IllustrisTNG simulation and their cosmological applications
• An Introductory Review on Cosmic Reionization
• Exploring the epoch of hydrogen reionization using FRBs
• Estimates of Fast Radio Burst Dispersion Measures from Cosmological Simulations
• A model for the repeating FRB 121102 in the AGN scenario
• What it Takes to Measure Reionization with Fast Radio Bursts
• The dispersion measure and scattering of FRBs: Contributions from the intergalactic medium, foreground halos, and hosts
• Galaxy clusters in simulations of the local Universe: a matter of constraints
• Revealing the cosmic reionisation history with fast radio bursts in the era of Square Kilometre Array
• The discovery and significance of fast radio bursts
• The Impact of baryonic physics on the kinetic Sunyaev-Zel'dovich Effect
• Cosmic Reionization May Still Have Started Early and Ended Late: Confronting Early Onset with CMB Anisotropy and 21 cm Global Signals
• Collapsing supra-massive magnetars: FRBs, the repeating FRB121102 and GRBs
• The Cosmic Dispersion Measure in the EAGLE Simulations
• Constraining the Epoch of Reionization With Highly Dispersed Fast Radio Bursts
• The Dispersion Measure Contributions of the Cosmic Web
• Hybrid Pulsar-Magnetar Model for FRB 20191221A
• Prospects of FRBs and Large Scale 21 cm Power Spectra in Constraining the Epoch of Reionization
• The asymmetry of dawn: evidence for asymmetric reionization histories from a joint analysis of cosmic microwave background and astrophysical data