The galactic central region is supposed to play a key role in the evolution in the galaxy. The center of our Galaxy is known to be a complex and enigmatic. Observations show that the strength of the magnetic field within the central few hundred parsecs of the Galaxy is stronger than in the Galactic disk region, and its magnetic energy is comparable to or even surpasses the thermal and kinetic energy of the interstellar gas. Therefore, it is essential to study the role of the magnetic field to understand the behavior of the interstellar gas in the Galactic center region.
In our study, we take into account radiative heating and cooling for the interstellar gas and present the results of numerical simulations of magnetohydrodynamics of the interstellar gas in the Galactic center region. We observe the formation of a mid-latitude low-plasma beta zone (dominated by magnetic field pressure), which would not have appeared in the model without radiative heating and cooling. As a contribution of the magnetic field to the thermal energy, we also found the formation of a high-temperature gas layer reaching 10^6-7 K by magnetic heating in a low-density gas which is a few 100 pc away from the Galactic mid-plane. These results indicate that magnetic fields strongly affect thermal and dynamical structures. We also indicate the direction of further studies on the interaction between the interstellar medium and magnetic fields in the Galactic center region.