668 citations · 3.4k across the 62 of their papers we have counts for
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Particle on the Innermost Stable Circular Orbit of a Rapidly Spinning Black Hole
Samuel E. Gralla, Achilleas P. Porfyriadis, Niels Warburton
We compute the radiation emitted by a particle on the innermost stable circular orbit of a rapidly spinning black hole both (a) analytically, working to leading order in the deviat…
QED Plasma and Magnetars
Marat Freytsis, Samuel E. Gralla
Magnetars are surrounded by diffuse plasma in magnetic field strengths well above the quantum electrodynamic critical value. We derive equations of "quantum force-free electrodynam…
Electromagnetic Jets from Stars and Black Holes
Samuel E. Gralla, Alexandru Lupsasca, Maria J. Rodriguez
We present analytic force-free solutions modeling rotating stars and black holes immersed in the magnetic field of a thin disk that terminates at an inner radius. The solutions are…
Note on Bunching of Field Lines in Black Hole Magnetospheres
Samuel E. Gralla, Alexandru Lupsasca, Maria J. Rodriguez
Numerical simulations of Blandford-Znajek energy extraction at high spin have revealed that field lines tend to bunch near the poles of the event horizon. We show that this behavio…
Nonaxisymmetric Poynting Jets
Samuel E. Gralla, Ted Jacobson
The relativistic plasma jets from a misaligned black hole-accretion disk system will not be axially symmetric. Here we analyze nonaxisymmetric, stationary, translation invariant je…