HLRB Project pr32nu
Magnetorotational instability in hot accretion flows
Regional Observatory, Heidelberg
Proposing Institution
Regional Observatory, Heidelberg
Project Manager
Steffen Brinkmann
Königstuhl 12
69117 Heidelberg
Abstract
Accreting systems pose numerous questions concerning the details of accretion and ejection of matter. The channels through which angular momentum is transported outwards are unclear, as well as the global structure of the accretion flow close to the central object and the processes that lead to jets and their properties.We simulate the innermost region of a black hole accretion disc. By performing global, direct numerical simulations with different initial magnetic configurations, we examine the widely accepted assumption, that the accreting matter "forgets" its original magnetic state. Also, we investigate the launching mechanisms of slow and fast winds andtheir properties.We apply the well-tested finite-volume-code PLUTO, making use of its RMHD (special Relativistic MagnetoHydroDynamics) module with 3nd-order time stepping and 2nd-order spatial reconstruction. Magnetic monopoles are avoided by the use of a flux constrained transport algorithm on a staggered grid.
