504 citations · 5.2k across the 62 of their papers we have counts for
8 papers · 2 filters
Numerical simulations of super-critical black hole accretion flows in general relativity
A. Sadowski, R. Narayan, J. C. McKinney +1
A new general relativistic radiation magnetohydrodynamical code KORAL, is described, which employs the M1 scheme to close the radiation moment equations. The code has been successf…
Simulating the effect of the Sgr A* accretion flow on the appearance of G2 after pericenter
David Abarca, Aleksander Sadowski, Lorenzo Sironi
We study the dynamical interaction of the G2 cloud with the accretion flow around Sgr A* by means of three-dimensional, hydrodynamic simulations. We show the effects of the rotatin…
Inner Disc Obscuration in GRS 1915+105 Based on Relativistic Slim Disc Model
K. Vierdayanti, A. Sadowski, S. Mineshige +1
We study the observational signatures of the relativistic slim disc of 10 M_sun black hole, in a wide range of mass accretion rate, mdot, dimensionless spin parameter, a_ast, and v…
General Relativistic Magnetohydrodynamic Simulations of Blandford-Znajek Jets and the Membrane Paradigm
Robert F. Penna, Ramesh Narayan, Aleksander Sadowski
Recently it has been observed that the scaling of jet power with black hole spin in galactic X-ray binaries is consistent with the predictions of the Blandford-Znajek (BZ) jet mode…
Energy, momentum and mass outflows and feedback from thick accretion discs around rotating black holes
A. Sadowski, R. Narayan, R. Penna +1
Using long-duration general relativistic magnetohydrodynamic simulations of radiatively inefficient accretion discs, the energy, momentum and mass outflow rates from such systems a…
Location of the bow shock ahead of cloud G2 at the Galactic Center
A. Sadowski, R. Narayan, L. Sironi +1
We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Center black hole Sgr A*. We take as our initial con…
Semi-implicit scheme for treating radiation under M1 closure in general relativistic conservative fluid dynamics codes
Aleksander Sadowski, Ramesh Narayan, Alexander Tchekhovskoy +1
A numerical scheme is described for including radiation in multi-dimensional general-relativistic conservative fluid dynamics codes. In this method, a covariant form of the M1 clos…
Radio light curves during the passage of cloud G2 near Sgr A*
A. Sadowski, L. Sironi, D. Abarca +3
We calculate radio light curves produced by the bow shock that is likely to form in front of the G2 cloud when it penetrates the accretion disk of Sgr A*. The shock acceleration of…