Role of shocked accretion flows in regulating the QPO of galactic black hole candidates

@article{Das2003RoleOS,
  title={Role of shocked accretion flows in regulating the QPO of galactic black hole candidates},
  author={Tapas K. Das},
  journal={arXiv: Astrophysics},
  year={2003}
}
  • T. Das
  • Published 3 February 2003
  • Physics
  • arXiv: Astrophysics
Using a generalized non-spherical, multi-transonic accretion flow model, we analytically calculate the normalized QPO frequency ${\bar {\bf {\nu}}}_{qpo}$ of galactic black hole candidates in terms of dynamical flow variables and self-consistently study the dependence of ${\bar {\bf {\nu}}}_{qpo}$ on such variables. Our results are in fairly close agreement with the observed QPO frequencies of GRS 1915+105. We find that ${\bar {\bf {\nu}}}_{qpo}$ is quite sensitive to various parameters… Expand
Quasi-periodic oscillation frequencies and mass-outflow rates in black hole powered Galactic microquasars
For all available pseudo-Schwarzschild potentials, we provide a non-self-similar model of coupled accretion-outflow systems in connection with the quasi-periodic oscillation (QPO) of black holeExpand
Chaotic and stochastic processes in the accretion flows of the black hole X-ray binaries revealed by recurrence analysis
The black hole candidates exhibit fast variability of their X-ray emission on a wide range of timescales. The short, coherent variations, with frequencies above 1 Hz, are referred to asExpand
Multitransonic Black Hole Accretion Disks with Isothermal Standing Shocks
In this work we address the issue of shock formation in black hole accretion disks. We provide a generalized two-parameter solution scheme for multitransonic accretion and wind around SchwarzschildExpand
Behaviour of matter close to the event horizon
ABSTRACT Investigation of the behaviour of accreting matter close to the black hole event horizonis of fundamental importance in relativistic and high energy astrophysics because theyprovide the keyExpand
Shocks in the low angular momentum accretion flow
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 sourcesExpand
Multi-transonic spherical-type flows around massive black holes: galactic potential induced standing isothermal shocks
Accretion on length-scales of interstellar or even intergalactic is particularly relevant, in the context of spherical or quasi-spherical hot mode accretion, supposedly powering low excitation radioExpand
Hysteresis effects and diagnostics of the shock formation in low angular momentum axisymmetric accretion in the Kerr metric
Abstract The secular evolution of the purely general relativistic low angular momentum accretion flow around a spinning black hole is shown to exhibit hysteresis effects. This confirms that aExpand
Shock oscillation model for quasi-periodic oscillations in stellar mass and supermassive black holes
We numerically examine centrifugally supported shock waves in 2D rotating accretion flows around a stellar mass (10 M⊙) and a supermassive (10 6 M⊙) black holes over a wide range of input accretionExpand
Radiative Shocks in Rotating Accretion Flows around Black Holes
It is well known that the rotating inviscid accretion flows with adequate injection parameters around black holes could form shock waves close to the black holes, after the flow passes through theExpand
Oscillating shocks in the low angular momentum flows as a source of variability of accreting black holes
We derive the conditions for shock formation in a quasi-spherical, slightly rotating flows. We verify the results of semi-analytical, stationary calculations with the time evolution studied byExpand
...
1
2
...

References

SHOWING 1-10 OF 31 REFERENCES
Resonance Oscillation of Radiative Shock Waves in Accretion Disks around Compact Objects
We extend our previous numerical simulation of accretion disks with shock waves when cooling effects are also included. We consider bremsstrahlung and other power law processes: $\Lambda \proptoExpand
Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes
We study the spectral properties of a very general class of accretion disks which can be decomposed into three distinct components apart from a shock at $r=r_s$: (1) An optically thick Keplerian diskExpand
Two Different Long-Term Behaviors in Black Hole Candidates: Evidence for Two Accretion Flows?
We discuss the results of long-term hard X-ray monitoring of Galactic black hole candidates 1E 1740.7-2942, GRS 1758-258, Cyg X-1, GX 339-4, and Cyg X-3 with the Rossi X-Ray Timing Explorer. TheExpand
Generalized Shock Solutions for Hydrodynamic Black Hole Accretion
For the first time, all available pseudo-Schwarzschild potentials are exhaustively used to investigate the possibility of shock formation in hydrodynamic, invicid, black hole accretion discs. It isExpand
Mass outflow rate from accretion discs around compact objects
We compute mass outflow rates from accretion discs around compact objects, such as neutron stars and black holes. These computations are done using combinations of exact transonic inflow and outflowExpand
RXTE Observations of QPOs in the Black Hole Candidate GRS 1915+105
We report on quasi-periodic oscillations (QPOs) in the black hole candidate GRS 1915+105 seen in 31 observations made by the Proportional Counter Array on board the Rossi X-Ray Timing Explorer. WeExpand
Quasi-periodic Oscillations and Spectral States in GRS 1915+105
We present results from the analysis of X-ray energy spectra and quasi-periodic oscillations (QPOs) from a set of observations that samples a broad range of time variability in GRS 1915+105. We firstExpand
Origin of 'normal-branch' quasiperiodic oscillations in low-mass X-ray binary systems
QUASIPERIODIC intensity oscillations with frequencies in the range 6–10 Hz have recently been discovered in luminous low-mass X-ray binary systems1,2. These so-called 'normal-branch' oscillationsExpand
Computation of Mass-Outflow Rates from Advective Accretion Disks around Black Holes
The existing models which study the origin, acceleration and collimation of mass outflow in the form of jets from AGNs and Quasars are roughly of three types. The first type of solutions confineExpand
Mechanisms for High-frequency QPOs in Neutron Star and Black Hole Binaries
We explain the millisecond variability detected by Rossi X-ray Timing Explorer (RXTE) in the X-ray emission from a number of low mass X-ray binary systems (Sco X-1, 4U1728-34, 4U1608-522, 4U1636-536,Expand
...
1
2
3
4
...