Protostellar jets and magnetic diffusion
- We investigate the evolution of a disk wind into a collimated jet under the influence of magnetic diffusivity. Using the ZEUS-3D code in the axisymmetry option we solve the time-dependent resistive MHD equations for a model setup of a central star surrounded by an accretion disk. The disk is taken as a time-independent boundary condition for the mass flow rate and the magnetic flux distribution. We find that the diffusive jets propagate slower into the ambient medium, most probably due to the lower mass flow rate in axial direction. Close to the star we find that a quasi stationary state evolves after several hundreds (weak diffusion) or thousands (strong diffusion) of disk rotations. Magnetic diffusivity affects the protostellar jet structure de-collimating it. We explain these effects in the framework of the Lorentz force.
| Author details: | Miljenko CemeljicORCiDGND, Christian FendtORCiDGND |
|---|---|
| URL: | http://arxiv.org/pdf/astro-ph/0211513 |
| ISBN: | 1-4020-1617-4 |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2003 |
| Publication year: | 2003 |
| Release date: | 2017/03/24 |
| Source: | Jets in young stellar objects : theory and observations ; a JENAMS 2002 workshop, Porto, Portugal, 3-5 September 2002 / Hrsg.: A. J. L. Fernandes; Paulo J. V. Garcia; J. J. G. Lima. - 2003. - ISBN: 1-4020-1617-4. - (Astrophysics and space scince ; 287). - S. 1 - 4 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
