<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo."^^ . "The results of three-dimensional, axisymmetric, magnetohydrodynamic simulations are presented, investigating the \r\nlaunching of jets and outflows from a magnetically diffusive accretion disk.\r\nThe time evolution of the disk structure is self--consistently taken into account.\r\nIn contrast to previous works, spherical coordinates for the numerical grid were applied.\r\nThe new setup made it possible to run simulations for more than 150,000 dynamical times \r\non a domain extending 1500 inner disk radii with a resolution of up to 24 cells per \r\ndisk height in the inner disk.\r\nThis, in fact, is the longest and resolved simulation performed so far.\r\n\r\nA novel approach to the analysis of disk-jet system was developed\r\nand interrelations between the properties of the jet and the underlying disk were derived.\r\nUsing this method, it was shown that it is the actual disk magnetization that best describes the disk--jet evolution.\r\nThe actual disk magnetization at the jet foot point is\r\nthe main parameter that governs the properties of the jet, namely all jet steady-state MHD integrals.\r\nDepending on the disk magnetization, jet launching occurs in two different but complementary\r\nregimes - jets driven predominantly by centrifugal or magnetic forces. \r\nThese regimes differ in the ejection efficiency concerning mass, energy, angular momentum, and all jet integrals.\r\n\r\nThe self-generation of the magnetic field by a Alpha-Omega mean-field dynamo was also addressed.\r\nIn this setup, the magnetic flux is continuously generated, diffuses outwards the disk, and fills the entire disk.\r\nA magnetic field of the inner disk is similar to open \r\nfield structure, favoring magneto-centrifugal launching.\r\nThe outer disk field is highly inclined and predominantly radial. \r\nThe differential rotation induces a strong toroidal component that plays the key role in the outflow launching.\r\nThese outflows from the outer disk are slower, denser, and less collimated.\r\nA toy--model triggering a time-dependent mean-field dynamo was invented.\r\nThe general result is that the episodic ejection and large-scale jet knots can be steered\r\nby a time-dependent dynamo that regenerates the jet-launching magnetic field."^^ . "2014" . . . . . . . "Deniss"^^ . "Stepanovs"^^ . "Deniss Stepanovs"^^ . . . . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (PDF)"^^ . . . "stepanovs-deniss-thesis.pdf"^^ . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (Other)"^^ . . . . . . "small.jpg"^^ . . . "Launching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo. (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #17782 \n\nLaunching Jets and Outflows from Magnetized Accretion Disks. Adection, Diffusion, Dynamo.\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .