Depolarization effects of the magnetic fields in a spiral galaxy obtained from 3D MHD simulation
speaker: Yuta Tashima
Abstract:
I would like to talk about an observational visualization of a spiral galaxy based on MHD simulation. Radio observations have shown that the average magnetic field strength of spiral galaxies is about a few micro G, but the structure of the global field is still unknown. Since observables are integral values on the line of sight, it is not possible to directly obtain a three-dimensional structure. So it is necessary to compare observables with simulated observables using numerical MHD simulations. We focus on the Faraday rotation and depolarization effects in the meter wavelength. Since the Faraday rotation amount is very large in meter wave length observation, the depolarization effect is very important. I will report the effect of depolarization on radio observations.