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Black Hole Spin and the Radio Loud/Quiet Dichotomy of Active Galactic Nuclei
Alexander Tchekhovskoy, Ramesh Narayan, Jonathan C. McKinney
Radio loud active galactic nuclei (AGN) are on average 1000 times brighter in the radio band compared to radio quiet AGN. We investigate whether this radio loud/quiet dichotomy can…
Magnetohydrodynamic Simulations of Gamma-Ray Burst Jets: Beyond the Progenitor Star
Alexander Tchekhovskoy, Ramesh Narayan, Jonathan C. McKinney
Achromatic breaks in afterglow light curves of gamma-ray bursts (GRBs) arise naturally if the product of the jet's Lorentz factor γand opening angle Θ_j satisfies (γΘ_j) >> 1 at th…
Stability of Relativistic Force-Free Jets
Ramesh Narayan, Jason Li, Alexander Tchekhovskoy
We consider a two-parameter family of cylindrical force-free equilibria, modeled to match numerical simulations of relativistic force-free jets. We study the linear stability of th…
Efficiency of Magnetic to Kinetic Energy Conversion in a Monopole Magnetosphere
Alexander Tchekhovskoy, Jonathan C. McKinney, Ramesh Narayan
Unconfined relativistic outflows from rotating, magnetized compact objects are often well-modeled by assuming the field geometry is approximately a split-monopole at large radii. E…