Jets, disc-winds and oscillations in general relativistic, magnetically driven flows around black hole
arXiv:2105.11468 · doi:10.1093/mnras/stab1512
Abstract
Relativistic jets and disc-winds are typically observed in BH-XRBs and AGNs. However, many physical details of jet launching and the driving of disc winds from the underlying accretion disc are still not fully understood. In this study, we further investigate the role of the magnetic field strength and structure in launching jets and disc winds. In particular, we explore the connection between jet, wind, and the accretion disc around the central black hole. We perform axisymmetric GRMHD simulations of the accretion-ejection system using adaptive mesh refinement. Essentially, our simulations are initiated with a thin accretion disc in equilibrium. An extensive parametric study by choosing different combinations of magnetic field strength and initial magnetic field inclination is also performed. Our study finds relativistic jets driven by the Blandford \& Znajek (BZ) mechanism and the disc-wind driven by the Blandford \& Payne (BP) mechanism. We also find that plasmoids are formed due to the reconnection events, and these plasmoids advect with disc-winds. As a result, the tension force due to the poloidal magnetic field is enhanced in the inner part of the accretion disc, resulting in disc truncation and oscillation. These oscillations result in flaring activities in the jet mass flow rates. We find simulation runs with a lower value of the plasma-, and lower inclination angle parameters are more prone to the formation of plasmoids and subsequent inner disc oscillations. Our models provide a possible template to understand spectral state transition phenomena in BH-XRBs.
21 pages, 20 figures, accepted for publication in MNRAS
References in corpus (19)
- Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
- A new method for shadow calculations: application to parameterised axisymmetric black holes
- Relativistic Jets Shine through Shocks or Magnetic Reconnection?
- ECHO: an Eulerian Conservative High Order scheme for general relativistic magnetohydrodynamics and magnetodynamics
- The Influence of Magnetic Field Geometry on the Evolution of Black Hole Accretion Flows: Similar Disks, Drastically Different Jets
- MHD simulations of jet acceleration from Keplerian accretion disks: the effects of disk resistivity
- Magnetically Arrested Disks and Origin of Poynting Jets: Numerical Study
- Accretion Discs with Strong Toroidal Magnetic Fields
- Relativistic magnetic reconnection in pair plasmas and its astrophysical applications
- Magnetohydrodynamic Simulations of Active Galactic Nucleus Disks and Jets
- Sgr A* near-infrared flares from reconnection events in a magnetically arrested disc
- An overview of jets and outflows in stellar mass black holes
- rHARM: Accretion and Ejection in Resistive GR-MHD
- GRMHD/RMHD Simulations and Stability of Magnetized Spine-Sheath Relativistic Jets
- General relativistic polarized radiative transfer with inverse Compton scatterings
- A two-component jet model based on the Blandford-Znajek and Blandford-Payne processes
- Radiation Hydrodynamics in Kerr Spacetime: Equations without Coordinate Singularity at the Event Horizon
- Numerical simulation of magnetic reconnection around a black hole
- Magnetic shear-driven instability and turbulent mixing in magnetized protostellar disks