20 citations · 46 across the 5 of their papers we have counts for
6 papers
Cosmic Gamma Ray Bursts
A. Janiuk, B. James, K. Sapountzis
Gamma ray bursts (GRBs) are astronomical phenomena detected at highest energies. The gamma ray photons carry energies on the order of mega-electronovolts and arrive to us from the…
Numerical simulations of black hole accretion flows
Agnieszka Janiuk, Kostas Sapountzis, Jeremy Mortier +1
We model the structure and evolution of black hole accretion disks, and their neighboring regions, using numerical simulations. The numerics is governed by the equations of general…
The MRI imprint on the Short-GRB Jets
K. Sapountzis, A. Janiuk
Short gamma ray bursts are presumably results of binary neutron star mergers, which lead to the formation of a stellar mass black hole, surrounded by a remnant matter. The strong m…
Microphysics in GRB central engine
Agnieszka Janiuk, Katarzyna Wojczuk, Konstantinos Sapountzis
We study the structure and evolution of the accreting plasma in gamma ray burst central engines. The models are based on the general relativistic MHD simulations. The nuclear equat…
Rarefaction wave in relativistic steady magnetohydrodynamic flows
Konstantinos Sapountzis, Nektarios Vlahakis
We construct and analyze a model of the relativistic steady-state magnetohydrodynamic (MHD) rarefaction that is induced when a planar symmetric flow (with one ignorable Cartesian c…
Rarefaction acceleration in magnetized gamma-ray burst jets
Konstantinos Sapountzis, Nektarios Vlahakis
Relativistic jets associated with long/soft gamma-ray bursts are formed and initially propagate in the interior of the progenitor star. Because of the subsequent loss of their exte…