<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "GRMHD Launching of Resistive and Dynamo Active Disks"^^ . "Astrophysical jets appear as linear collimated objects of high speed that are typically found in young stellar objects, X-Ray binaries, gamma-ray bursts, or active galactic nuclei.\r\nThe physical procedures that lead to the development of these jets have been studied extensively in the past years.\r\nWe believe that the launching of highly relativistic jets requires the existence of an accretion disk threaded by a strong magnetic field that rotates around a black hole.\r\nWe perform general relativistic magnetohydrodynamic simulations of outflow launching from thin accretion disks.\r\nAs in the nonrelativistic case, resistivity is essential for the mass loading of the disk wind.\r\nWe implemented resistivity in the ideal GRMHD code HARM3D, which allows us to run simulations with larger physical grids, higher spatial resolution, and longer simulation time.\r\nWe present the numerical details of the code and we show numerical test in the resistive regime that prove the robustness of the code.\r\nAs a reference simulation, we consider an initially thin, resistive disk orbiting the black hole, threaded by a large-scale magnetic flux.\r\nAs the system evolves, outflows are launched from the black hole magnetosphere and the disk surface.\r\nWe mainly focus on disk outflows, investigating their MHD structure and energy output in comparison with the Poynting-dominated black hole jet.\r\nThe disk wind encloses two components -- a fast component dominated by the toroidal magnetic field and a slower component dominated by the poloidal field.\r\nThe disk wind transitions from sub- to super-Alfvenic speed, reaching velocities approximately 0.1c.\r\nWe provide parameter studies varying spin parameter and resistivity level and measure the respective mass and energy fluxes.\r\nA higher spin strengthens the disk wind dominated by the toroidal component of the magnetic field along the inner jet.\r\nWe disentangle a critical resistivity level that leads to a maximum matter and energy output for both, resulting from the interplay between reconnection and diffusion, which in combination govern the magnetic flux and \r\nthe mass loading.\r\nFor counterrotating black holes the outflow structure shows a magnetic field reversal.\r\nWe also show the structure and direction of the electric field and its connection with the velocity and magnetic field vectors.\r\nFinally, we present the first fully dynamical simulation of dynamo generated poloidal magnetic field in a GRMHD environment. \r\nWe simulate cases of both accretion tori and disks and we find induced magnetic field with both dipolar and quadrupolar structure.\r\nWe follow the evolution of the field structure and strength and we show the launching of outflows from the torus/disk surface and the black hole magnetosphere."^^ . "2020" . . . . . . . . "Christos"^^ . "Vourellis"^^ . "Christos Vourellis"^^ . . . . . . "GRMHD Launching of Resistive and Dynamo Active Disks (PDF)"^^ . . . "Vourellis_Dissertation.pdf"^^ . . . "GRMHD Launching of Resistive and Dynamo Active Disks (PDF)"^^ . . . . "Vourellis_Dissertation_Erratum.pdf"^^ . . . "GRMHD Launching of Resistive and Dynamo Active Disks (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "GRMHD Launching of Resistive and Dynamo Active Disks (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #27698 \n\nGRMHD Launching of Resistive and Dynamo Active Disks\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .