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Tidal Disruption and Magnetic Flux Capture: Powering a Jet from a Quiescent Black Hole
Luke Zoltan Kelley, Alexander Tchekhovskoy, Ramesh Narayan
The transient Swift J1644+57 is believed to have been produced by an unlucky star wandering too close to a supermassive black hole (BH) leading to a tidal disruption event. This un…
Magnetic Flux of Progenitor Stars Sets Gamma-ray Burst Luminosity and Variability
Alexander Tchekhovskoy, Dimitrios Giannios
Long-duration gamma-ray bursts (GRBs) are thought to come from the core-collapse of Wolf-Rayet stars. Whereas their stellar masses have a rather narrow distribution, the popu…
Global simulations of axisymmetric radiative black hole accretion disks in general relativity with a sub-grid magnetic dynamo
Aleksander Sadowski, Ramesh Narayan, Alexander Tchekhovskoy +3
We present a sub-grid model that emulates the magnetic dynamo operating in magnetized accretion disks. We have implemented this model in the general relativisic radiation magnetohy…
On The Efficiency of Jet Production in Radio Galaxies
Rodrigo S. Nemmen, Alexander Tchekhovskoy
The mechanisms that produce and power relativistic jets are fundamental open questions in black hole (BH) astrophysics. In order to constrain these mechanisms, we analyze the energ…