80 citations · 383 across the 14 of their papers we have counts for
9 papers · 1 filter
Time delays between radio and X-ray and between narrow radio bands of Sgr A* flares in the shock oscillation model
Toru Okuda, Chandra B. Singh, Ramiz Aktar
We examine the time delay between radio and X-ray and between narrow radio frequency flares in Sagittarius A* (Sgr A*), from analyses of the synchrotron, bremsstrahlung and monochr…
Radiative shock oscillation model for the long-term flares of Sgr A*
T. Okuda, C. B. Singh, R. Aktar
We examine time-dependent 2D relativistic radiation MHD flows to develop the shock oscillation model for the long-term flares of Sgr A*. Adopting modified flow parameters in additi…
Effects of resistivity on standing shocks in low angular momentum flows around black holes
Chandra B. Singh, Toru Okuda, Ramiz Aktar
We study two dimensional low angular momentum flow around the black hole using the resistive magnetohydrodynamic module of PLUTO code. Simulations have been performed for the flows…
Radiative Shocks around Super-Eddington Accreting Black Holes
Toru Okuda, Chandra B. Singh
We examine radiative standing shocks in advective accretion flows around stellar-mass black holes by 2D radiation hydrodynamic simulations, focusing on the super-Eddington accretin…
A Possible Model for the Long-Term Flares of Sgr A*
Toru Okuda, Chandra B. Singh, Santabrata Das +3
We examine the effects of magnetic field on low angular momentum flows with standing shock around black holes in two dimensions. The magnetic field brings change in behavior and lo…
Unstable mass-outflows in geometrically thick accretion flows around black holes
Toru Okuda, Santabrata Das
Accretion flows around black holes generally result in mass-outflows that exhibit irregular behavior quite often. Using 2D time-dependent hydrodynamical calculations, we show that…
Low angular momentum flow model II for Sgr A*
Toru Okuda
We examine 1D two-temperature accretion flows around a supermassive black hole, adopting the specific angular momentum λ, the total specific energy εand the input accretion rate \d…
Low angular momentum flow model for Sgr A*
Toru Okuda, Diego Molteni
We examine the low angular momentum flow model for Sgr A* using two-dimensional hydrodynamical calculations based on the parameters of the specific angular momentum and total energ…
The Jets and Disc of SS 433 at Super-Eddington Luminosities
Toru Okuda, Galina V. Lipunova, Diego Molteni
We examine the jets and the disc of SS 433 at super-Eddington luminosities with 600 times Eddington critical accretion rate by time-dependent two-dimensional radiation hydrodynamic…