Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"GRMHD"”.
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GRMHD simulations and analysis of polarized emission from black hole accretion systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Black Hole Astrophysics : Magnetohydrodynamics on the Kerr Geometry
… of General Relativistic Magnetohydrodynamics (GRMHD). The behavior of non-radiative accretion flows and outflows on the Kerr space-time is analyzed. Basic equations of conservative GRMHD and aspects of numerical schemes are presented. Relativistic codes and astrophysical simulations validate …
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Black Hole Accretion Systems
… (MHD), and general relativistic MHD (GRMHD) equations of motion, which are integrated numerically. I wrote the VHD and nonrelativistic MHD numerical codes, and coauthored the GRMHD code (Gammie et al., 2003). I first studied VHD accretion disk models, such as those studied by …
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On Stability and Evolution of Solutions in General Relativity
… of general relativistic magnetohydrodynamics (GRMHD). We compute the eigenvalues and eigenvectors of GRMHD and establish degeneracy conditions. Finally, we consider the initial value problem for axisymmetric GRMHD. We formulate the general Einstein and MHD equations under the assumption of a …
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Self-consistent dynamical and radiative models of low-luminosity active galactic nuclei
… on general relativistic magnetohydrodynamic (GRMHD) simulations. Before proceeding, we noted, as others have before us, that global disk simulations model transient accretion flows in the sense that the numerical values for, e.g., the density decay with time as the initial disk drains into the …
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General-relativistic magnetohydrodynamics simulations of black hole accretion disks: dynamics and radiative properties
… general relativistic magnetohydrodynamics (GRMHD), to construct a realistic dynamical and radiation model of accretion disks. Our simulations are for black holes in low luminous regimes that probably possesses a hot and thick accretion disk. Flows in this regime are called radiatively …
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General relativistic radiation magnetohydrodynamics, with applications to black hole accretion disks
… for general relativistic magnetohydrodynamics (GRMHD). However, even the local details of MRI-driven turbulence simulations are still not completely understood. Along the way, this work considers a central issue with modeling the MRI: whether the resulting stress is independent of the numerics …
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General relativistic magnetohydrodynamic simulations of binary neutron star mergers
… fully general relativistic magnetohydrodynamic (GRMHD) binary neutron star merger (BNS) simulations, conducted by using the numerical code "Whisky" under various conditions, such as, different Equation of State (EOS) for neutron matter (APR4, Ideal fluid and H4 EOSs), masses (with equal/unequal …
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Relativistic Radiative Hydrodynamics Calculation of Accretion Flow into Supermassive Black Hole
… with general relativistic magnetohydrodynamic (GRMHD) simulation of accretion flow simulation. We are able to use the models to constrain observational parameters of Sgr A*. We also compute the synchrotron emissivity and absorptivity from first principles, in order to verify improved approximate …
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Dissipative heating and nonthermal distributions in black hole accretion flaring events
… using general relativistic magnetohydrodynamics (GRMHD) and radiative transfer calculations with a nonthermal kappa distribution function (which effectively adds a power-law tail to the thermal distribution) for electrons accelerated by resistive heating in reconnecting current sheets. This …
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Statistical methods for assisting computational models for the event horizon telescope
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms