CND with a very strong initial magnetic field - Marvin

These simulations have a strong (10-4 G) vertical initial magnetic field. Unlike my previous simulations, where the properties of the gas (e.g. gas density) were not that much affected by the magnetic field, here the development of the accretion disk seems to be dominated by the magnetic field.

The first animation shows the 3D mass density, after the first 20% of the simulation the disk starts to show strong spatial and temporal variations. Note also the density scale: The disk seems to be affected by a high mass loss.

The second animation shows the face-on view of the disk's plasma beta. The disk has regions with a high beta of 1000 or higher and regions with a beta near equipartition, but beta almost never falls below 1.

The last animation shows an edge-on view of the radial velocity (positive values only). The blue areas indicate inflowing material. We see that a conical outflow develops with speeds of about 700 km/s (these simulations were done without an outflow object). A very rough estimation gives outflow rates of 10-2 M_sun/yr. The total simulation time is 106 yr, so the huge mass loss is probably due to the conical outflow (total initial disk mass is 4x104 M_sun).

​Animation of 3D gas density

​Animation of face-on view of the plasma beta

​Animation of edge-on view of the radial velocity

3D gas density:

Face-on view of the plasma beta:

Edge-on view of the radial velocity:

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