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Disk Emission from Magneto-hydrodynamic Simulations of Spinning Black Holes
Jeremy D. Schnittman, Julian H. Krolik, Scott C. Noble
We present the results of a new series of global 3D relativistic magneto-hydrodynamic (MHD) simulations of thin accretion disks around spinning black holes. The disks have aspect r…
Star formation in quasar hosts and the origin of radio emission in radio-quiet quasars
Nadia L. Zakamska, Kelly Lampayan, Andreea Petric +11
Radio emission from radio-quiet quasars may be due to star formation in the quasar host galaxy, to a jet launched by the supermassive black hole, or to relativistic particles accel…
Radiation-driven outflows from and radiative support in dusty tori of active galactic nuclei
Chi-Ho Chan, Julian H. Krolik
Substantial evidence points to dusty, geometrically thick tori obscuring the central engines of active galactic nuclei (AGNs), but so far no mechanism satisfactorily explains why c…
Elliptical accretion and inefficient highly eccentric accretion and the low luminosity of stellar tidal disruption events
Gilad Svirski, Tsvi Piran, Julian Krolik
Models for tidal disruption events (TDEs) in which a supermassive black hole disrupts a star commonly assume that the highly eccentric streams of bound stellar debris promptly form…
A Steady-State Alignment Front in an Accretion Disk Subjected to Lense-Thirring Torques
Julian H. Krolik, John F. Hawley
Using only physical mechanisms, i.e., 3D MHD with no phenomenological viscosity, we have simulated the dynamics of a moderately thin accretion disk subject to torques whose radial…
Evolution of a Binary Black Hole with a Retrograde Circumbinary Accretion Disk
Jeremy D. Schnittman, Julian H. Krolik
We consider the evolution of a supermassive black hole binary (SMBHB) surrounded by a retrograde accretion disk. Assuming the disk is exactly in the binary plane and transfers ener…