3D MHD Simulations of Disk Accretion onto Magnetized Stars: Numerical Approach and Sample Simulations

TL;DR

This paper introduces a numerical approach for 3D magnetohydrodynamic simulations of disk accretion onto magnetized stars, demonstrating the code's capabilities through sample simulation results.

Contribution

It presents a new Godunov-type numerical code on a cubed sphere grid for simulating 3D MHD disk accretion onto rotating stars with complex magnetic fields.

Findings

Successful implementation of the code for 3D MHD simulations.

Sample simulation results illustrating accretion processes.

Validation of the numerical approach against known scenarios.

Abstract

We present results of global 3D MHD simulations of disk accretion to a rotating star with dipole and more complex magnetic fields using a Godunov-type code based on the "cubed sphere" grid developed earlier in our group. We describe the code and the grid and show examples of simulation results.