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

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