<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "On the numerical simulation of advection dominated accretion flows"^^ . "In accreting systems of low accretion rate (< 1% Eddington rate) the accretion is dominated by advection rather than by radiation or thermal convection. This type of accretion flow is assumed to cause the observational signatures of quiescent galaxies, X-ray binaries in the low-hard state and other compact objects. The motor that maintains the transport of angular momentum and accretion is the magnetorotational instability fed by the shearing of the magnetic field in the differential rotation of the disc. Direct observation of these objects is difficult due to their small size and because they are often hidden behind accreting matter. Therefore simulating the equations of ideal magnetohydrodynamics is necessary to investigate the structure and dynamics of these accretion flows. We carried out direct numerical simulations of an accreting torus around a black hole. By performing tests varying the initial magnetisation, the size and position of the torus and the geometry of the magnetic field, we found the crucial parameters that determine accretion and ejection. The results show that the initial geometry of the magnetic field is of almost no relevance for the long term behaviour. However, if the magnetic field strength is to small, no fast outflow arises. Also the presence of radiative cooling will inhibit powerful ejections. Moreover we report retrograde rotation of the jet with respect to the disc rotation."^^ . "2009" . . . . . . . . "Steffen"^^ . "Brinkmann"^^ . "Steffen Brinkmann"^^ . . . . . . "On the numerical simulation of advection dominated accretion flows (PDF)"^^ . . . "Brinkmann_phd.pdf"^^ . . . "On the numerical simulation of advection dominated accretion flows (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "On the numerical simulation of advection dominated accretion flows (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "On the numerical simulation of advection dominated accretion flows (Other)"^^ . . . . . . "preview.jpg"^^ . . . "On the numerical simulation of advection dominated accretion flows (Other)"^^ . . . . . . "medium.jpg"^^ . . . "On the numerical simulation of advection dominated accretion flows (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #9670 \n\nOn the numerical simulation of advection dominated accretion flows\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .