“Atlas” of numerical solutions for star-disk magnetospheric interaction

Nicolaus Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
e-mail: miki@camk.edu.pl

Received: 5 November 2018
Accepted: 7 February 2019

Abstract

Aims. I report results in numerical simulations of star-disk magnetospheric interaction. A thin accretion disk with a corona above a rotating stellar surface is simulated, and a parameter study is performed to find trends in the angular momentum flux. The results are presented for young stellar objects, but they can be rescaled to other objects with similar geometry.

Methods. I performed resistive and viscous magnetohydrodynamic simulations that reached a quasi-stationary state for cases with different parameters. I computed angular momentum fluxes in the different components of the flow to compare the results.

Results. I present the simulation results with the matter density distribution and a sample of the magnetic field lines, gathered in an “Atlas” of solutions. The torque exerted on the star is computed, together with the angular momentum flux that is expelled from the system in the cases with a conical outflow. I find trends in the components of the flow in the part of parameter space with a slowly rotating star.