Star-disk magnetospheric interaction with non-dipolar stellar field

Filip Cieciuch and Miljenko Čemeljić

In our study, we investigate non-dipolar geometries of stellar magnetic field. We perform resistive and viscous magneto-hydrodynamical simulations of a star-disk system and compare the results for the dipole, quadrupole, and octupole stellar magnetic fields. With the column positioned closer to the equatorial plane in the octupole case, runs tend to be more stable and reach the quasi-stationarity easier than in the cases with the stellar dipole field. In the quadrupole case, the matter flows directly onto the stellar equator, similar to the purely hydrodynamic case.

Proceedings of the Polish Astronomical Society, vol. 12, 192-194 (2022)

Download full article as PDF file: