Probing the anisotropic distribution of baryon matter in the Universe using fast radio bursts

Abstract

We propose that fast radio bursts (FRBs) can be used as the probes to constrain the possible anisotropic distribution of baryon matter in the Universe. Monte Carlo simulations show that, 400 (800) FRBs are enough to detect the anisotropy at 95\% (99\%) confidence level, if the dipole amplitude is at the order of magnitude 0.01. However, much more FRBs are required to tightly constrain the dipole direction. Even 1000 FRBs are far from enough to constrain the dipole direction within angular uncertainty $\Delta \theta <40^{\circ }$ at 95\% confidence level. The uncertainty on the dispersion measure of host galaxy does not significantly affect the results. If the dipole amplitude is in the level of 0.001, however, 1000 FRBs are not enough to correctly detect the anisotropic signal.

9 pages, 4 figures

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Cited by in corpus (6)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Inferring redshift and energy distributions of fast radio bursts from the first CHIME/FRB catalog
• Cosmological model-independent constraints on the baryon fraction in the IGM from fast radio bursts and supernovae data
• A search for the fine-structure constant evolution from fast radio bursts and type Ia supernovae data
• The BINGO/ABDUS Project: Forecast for cosmological parameters from a mock Fast Radio Bursts survey
• Unveiling the distribution and redshift dependence of host galaxy dispersion measures using localized fast radio bursts