2:30 PM - 2:45 PM
[PPS06-16] Inefficient Magnetic Accretion Heating in Protoplanetary Disks: Evolution of The Snow Line
Keywords:Protoplanetary disks, Magnetohydrodynamic simulation, Snow line
Purpose of this study is to investigate the accretion heating with the nonideal MHD effects and to understand thermal structure in the inner disk region. We perform local stratified MHD simulations including nonideal MHD effects and investigate the role of Joule heating and the resulting disk vertical temperature profiles. We find that Joule heating occurs at several scale heights above the midplane, making the midplane temperature much lower than that with the conventional viscous heating model. Also, 80 % of the accretion energy is flown out by the disk wind. Our results further suggest that the midplane temperature in the inner region is almost entirely determined by irradiation heating. We also discuss the evolution of the water snow line based on our results and the formation process of the earth.