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On the possible gamma-ray burst–gravitational wave association in GW150914
- A. Janiuk, M. Bejger, S. Charzyński, P. Sukov'a
- Physics
- 25 April 2016
Shocks in the low angular momentum accretion flow
- P. Sukov'a, A. Janiuk
- Physics
- 28 April 2015
We address the variability of low luminous galactic nuclei including the Sgr A* or other transient accreting systems, e.g. the black hole X-ray binaries, such as GX 339-4 or IGR J17091. These sources…
Effects of adiabatic index on the sonic surface and time variability of low angular momentum accretion flows
- Ishika Palit, A. Janiuk, P. Sukov'a
- PhysicsMonthly Notices of the Royal Astronomical Society
- 6 May 2019
We study the role of adiabatic index in determining the critical points in the transonic low angular momentum accretion flow onto a black hole. We present the general relativistic 2D hydrodynamic…
Accretion in a Dynamical Spacetime and the Spinning Up of the Black Hole in the Gamma-Ray Burst Central Engine
- A. Janiuk, P. Sukov'a, Ishika Palit
- PhysicsThe Astrophysical Journal
- 11 October 2018
We compute the evolution of a quasi-spherical, slowly rotating accretion flow around a black hole, whose mass and spin evolve adequately to transfer of mass and energy through the horizon. Our model…
Chaotic geodesic motion around a black hole and disc
- P. Sukov'a
- Physics
- 22 September 2011
We study the chaotic features of time-like free motion around a Schwarzschild black hole, induced by the presence of a static, axially and reflectionally symmetric thin disc or ring. We describe the…
Black Hole Accretion in Gamma Ray Bursts
- A. Janiuk, M. Bejger, P. Sukov'a, S. Charzyński
- Physics
- 26 January 2017
We study the structure and evolution of the hyperaccreting disks and outflows in the gamma ray bursts central engines. The torus around a stellar mass black hole is composed of free nucleons, Helium,…
Response of a class of mechanical oscillators described by a novel system of differential-algebraic equations
- J. Málek, K. Rajagopal, P. Sukov'a
- Physics
- 2 February 2016
We study the vibration of lumped parameter systems whose constituents are described through novel constitutive relations, namely implicit relations between the forces acting on the system and…
Effects of Self-gravity of the Accretion Disk Around Rapidly Rotating Black Hole in Long Gamma Ray Bursts
- Ishika Palit, A. Janiuk, P. Sukov'a
- Physics
- 15 May 2020
We prescribe a method to study the effects of self-gravity of accretion disk around a black hole associated with long Gamma Ray Bursts (GRBs) in an evolving background Kerr metric. This is an…
Recurrence of geodesics in a black-hole-disc field
- P. Sukov'a, O. Semerák
- Physics
- 6 July 2012
Processes around astrophysical black holes are usually modeled with test (nongravitating) matter and fields. However, the very fact that the holes are "visible" implies that some matter has to be…
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