Physical and chemical vertical structure of the magnetostatic accretion disks of young stars
Abstract
We investigate vertical structure of the accretion disks of young stars with fossil large-scale magnetic field. To simulate the vertical structure of the accretion disk, we solve the equation of magnetostatic equilibrium taking into account stellar gravity, gradients of gas and magnetic pressure. Thermal structure of the disk is calculated from the equation of heat transfer including effects of heating by turbulence and stellar radiation, as well as radiative cooling. Ordinary differential equations of the model are solved with the Runge-Kutta scheme of the 4th order. Radial structure of the disk is calculated with the help of the model of the accretion disks developed by Dudorov and Khaibrakhmanov. Simulated physical structure of the disk is used to model its chemical structure using the MONACO code. On the basis of the chemical modelling results, we analyze features of spatial distribution of CN molecules, which are the promising tool to measure the disk's magnetic field strength by detection of circular polarization due to the Zeeman splitting of the molecular lines.
- Publication:
-
First Moscow International Conference Submillimeter and Millimeter Astronomy: Objectives and Instruments
- Pub Date:
- April 2021
- Bibcode:
- 2021fmic.confE...3K