FRBs: the Dispersion Measure of Host Galaxies

Jaroszynski, M.

doi:10.48550/arxiv.2008.04634

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Using cosmological simulations to model baryonic distribution, [36] obtained results well fit by σ IGM ≈ 210 √ z. Further recent simulations bear this out [24,45,[49][50][51][52], and as in [25,27] we adopt…”

Section: B Dispersion Measure Componentsmentioning

confidence: 88%

Fast Radio Burst Dispersion Measure Distribution as a Probe of Helium Reionization

Bhattacharya,

Kumar,

Linder

2020

Preprint

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Fast radio burst (FRB) discoveries are occurring rapidly, with thousands expected from upcoming surveys. The dispersion measures (DM) observed for FRB include important information on cosmological distances and the ionization state of the universe from the redshift of emission until today. Rather than considering the DM-redshift relation, we investigate the statistical ensemble of the distribution of dispersion measures. We explore the use of this abundance information, with and without redshift information, to probe helium reionization. Carrying out Monte Carlo simulations of FRB survey samples, we examine the effect of different source redshift distributions, host galaxy models, sudden vs gradual reionization, and covariance with cosmological parameters on determination of helium reionization properties. We find that a fluence limited survey with 10 4 FRBs can discriminate different helium reionization histories at ∼ 6σ using the DM-distribution of bursts, without redshift information (and ∼ 10σ with redshifts).

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Section: B Dispersion Measure Componentsmentioning

confidence: 88%

Fast Radio Burst Dispersion Measure Distribution as a Probe of Helium Reionization

Bhattacharya,

Kumar,

Linder

2020

Preprint

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“…The factor 1 + z accounts for cosmological time dilation for a source at redshift z. The uncertainty σ IGM describes the deviation of an individual event from the mean DM IGM , due to the inhomogeneity of the baryon matter in the IGM, and we adopt the form [126]…”

Section: Jcap06(2023)052mentioning

confidence: 99%

A path to precision cosmology: synergy between four promising late-universe cosmological probes

Shao

Jin

et al. 2023

J. Cosmol. Astropart. Phys.

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In the next decades, it is necessary to forge new late-universe cosmological probes to precisely measure the Hubble constant and the equation of state of dark energy simultaneously. In this work, we show that the four novel late-universe cosmological probes, 21 cm intensity mapping (IM), fast radio burst (FRB), gravitational wave (GW) standard siren, and strong gravitational lensing (SGL), are expected to be forged into useful tools in solving the Hubble tension and exploring dark energy. We propose that the synergy of them is rather important in cosmology. We simulate the 21 cm IM, FRB, GW, and SGL data based on the hypothetical observations of the Hydrogen Intensity and Real-time Analysis eXperiment, the Square Kilometre Array, the Einstein Telescope, and the Large Synoptic Survey Telescope, respectively. We find that the four probes have different parameter dependencies in cosmological constraints, so any combination of them can break the degeneracies and thus significantly improve the constraint precision. The joint 21 cm IM+FRB+GW+SGL data can provide the constraint errors of σ(Ωm) = 0.0022 and σ(H 0) = 0.16 km s-1 Mpc-1 in the ΛCDM model, which meet the standard of precision cosmology, i.e., the constraint precision of parameters is better than 1%. In addition, the joint data give σ(w) = 0.020 in the wCDM model, and σ(w 0) = 0.066 and σ(wa ) = 0.25 in the w 0 wa CDM model, which are better than the constraints obtained by the CMB+BAO+SN data. We show that the synergy between the four late-universe cosmological probes has magnificent prospects.

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“…A more reasonable way to deal with DM host is to model it as a probability distribution and marginalize over the free parameters. It is shown that DM host can be fitted with log-normal distribution from theory and cosmological simulations [55,92,93]. Therefore, instead of assuming a constant DM host , we model it as a log-normal distribution centered at DM host and refit the data.…”

Section: -6mentioning

confidence: 99%

Search for the correlations between host properties and ${\rm DM_{host}}$ of fast radio bursts: constraints on the baryon mass fraction in IGM

Lin,

Li,

Tang

2022

Preprint

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The application of fast radio bursts (FRBs) as probes to investigate astrophysics and cosmology requires the proper modelling of the dispersion measures of Milky Way (DMMW) and host galaxy (DM host ). DMMW can be estimated using the Milky Way electron models, such as NE2001 model and YMW16 model. However, DM host is hard to model due to limited information on the local environment of FRBs. In this paper, using 17 well-localized FRBs, we search for the possible correlations between DM host and the properties of host galaxies, such as the redshift, the stellar mass, the star-formation rate, the age of galaxy, the offset of FRB site from galactic center, and the half-light radius. We find no strong correlation between DM host and any of the host property. Assuming that DM host is a constant for all host galaxies, we constrain the fraction of baryon mass in the intergalactic medium today to be fIGM,0 = 0.78 +0.15 −0.19 . If we model DM host as a log-normal distribution, however, we obtain a larger value, fIGM,0 = 0.83 +0.12 −0.17 . Based on the limited number of FRBs, no strong evidence for the redshift evolution of fIGM is found.

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FRBs: the Dispersion Measure of Host Galaxies

Cited by 4 publications

References 6 publications

Fast Radio Burst Dispersion Measure Distribution as a Probe of Helium Reionization

Fast Radio Burst Dispersion Measure Distribution as a Probe of Helium Reionization

A path to precision cosmology: synergy between four promising late-universe cosmological probes

Search for the correlations between host properties and ${\rm DM_{host}}$ of fast radio bursts: constraints on the baryon mass fraction in IGM

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