scholarly journals A General Relativistic Magnetohydrodynamic Simulation of Outflow Formation around Rotating Black Hole

2004 ◽  
Vol 155 ◽  
pp. 148-151
Author(s):  
Shinji Koide
Keyword(s):  
Black Hole ◽  
Rotating Black Hole ◽  
General Relativistic ◽  
Magnetohydrodynamic Simulation

General Relativistic Simulations of Early Jet Formation in a Rapidly Rotating Black Hole Magnetosphere

2000 ◽  
Vol 536 (2) ◽  
pp. 668-674 ◽  
Author(s):  
Shinji Koide ◽  
David L. Meier ◽  
Kazunari Shibata ◽  
Takahiro Kudoh
Keyword(s):  
Black Hole ◽  
Jet Formation ◽  
Rotating Black Hole ◽  
General Relativistic

scholarly journals General Relativistic Magnetohydrodynamic Simulations of Collapsars: Rotating Black Hole Cases

2004 ◽  
Vol 615 (1) ◽  
pp. 389-401 ◽  
Author(s):  
Yosuke Mizuno ◽  
Shoichi Yamada ◽  
Shinji Koide ◽  
Kazunari Shibata
Keyword(s):  
Black Hole ◽  
Rotating Black Hole ◽  
General Relativistic ◽  
Magnetohydrodynamic Simulations

scholarly journals QUASI-PERIODIC OSCILLATIONS AND FREQUENCIES IN AN ACCRETION DISK AND COMPARISON WITH THE NUMERICAL RESULTS FROM NON-ROTATING BLACK HOLE COMPUTED BY THE GRH CODE

2007 ◽  
Vol 22 (02) ◽  
pp. 141-157 ◽  
Author(s):  
ORHAN DONMEZ
Keyword(s):  
Black Hole ◽  
Accretion Disk ◽  
Numerical Results ◽  
Pressure Gradients ◽  
Periodic Oscillations ◽  
Rotating Black Hole ◽  
Accretion Flows ◽  
Numerical Result ◽  
General Relativistic ◽  
Physical Phenomena

The shocked wave created on the accretion disk after different physical phenomena (accretion flows with pressure gradients, star-disk interaction etc.) may be responsible observed Quasi Periodic Oscillations (QPOs) in X-ray binaries. We present the set of characteristics frequencies associated with accretion disk around the rotating and non-rotating black holes for one particle case. These persistent frequencies are results of the rotating pattern in an accretion disk. We compare the frequency's from two different numerical results for fluid flow around the non-rotating black hole with one particle case. The numerical results are taken from Refs. 1 and 2 using fully general relativistic hydrodynamical code with non-selfgravitating disk. While the first numerical result has a relativistic tori around the black hole, the second one includes one-armed spiral shock wave produced from star-disk interaction. Some physical modes presented in the QPOs can be excited in numerical simulation of relativistic tori and spiral waves on the accretion disk. The results of these different dynamical structures on the accretion disk responsible for QPOs are discussed in detail.

scholarly journals STEADY GENERAL RELATIVISTIC MAGNETOHYDRODYNAMIC INFLOW/OUTFLOW SOLUTION ALONG LARGE-SCALE MAGNETIC FIELDS THAT THREAD A ROTATING BLACK HOLE

2015 ◽  
Vol 801 (1) ◽  
pp. 56 ◽  
Author(s):  
Hung-Yi Pu ◽  
Masanori Nakamura ◽  
Kouichi Hirotani ◽  
Yosuke Mizuno ◽  
Kinwah Wu ◽  
...  
Keyword(s):  
Black Hole ◽  
Magnetic Fields ◽  
Large Scale ◽  
Rotating Black Hole ◽  
General Relativistic

scholarly journals Bondi–Hoyle accretion around the non-rotating black hole in 4D Einstein–Gauss–Bonnet gravity

2021 ◽  
Vol 81 (2) ◽  
Author(s):  
Orhan Donmez
Keyword(s):  
Black Hole ◽  
Black Hole Solution ◽  
Coupling Constants ◽  
Shock Capturing ◽  
Coupling Constant ◽  
Bonnet Gravity ◽  
Rotating Black Hole ◽  
Downstream Region ◽  
General Relativistic ◽  
Negative Coupling

AbstractIn this paper, the numerical investigation of a Bondi–Hoyle accretion around a non-rotating black hole in a novel four dimensional Einstein–Gauss–Bonnet gravity is investigated by solving the general relativistic hydrodynamical equations using the high resolution shock capturing scheme. For this purpose, the accreated matter from the wind-accreating X-ray binaries falls towards the black hole from the far upstream side of the domain, supersonically. We study the effects of Gauss–Bonnet coupling constant $$\alpha $$ α in 4D EGB gravity on the accreated matter and shock cones created in the downstream region in detail. The required time having the shock cone in downstream region is getting smaller for $$\alpha > 0$$ α > 0 while it is increasing for $$\alpha < 0$$ α < 0 . It is found that increases in $$\alpha $$ α leads violent oscillations inside the shock cone and increases the accretion efficiency. The violent oscillations would cause increase in the energy flux, temperature, and spectrum of X-rays. So the quasi-periodic oscillations (QPOs) are naturally produced inside the shock cone when $$-5 \le \alpha \le 0.8$$ - 5 ≤ α ≤ 0.8 . It is also confirmed that EGB black hole solution converges to the Schwarzschild one in general relativity when $$\alpha \rightarrow 0$$ α → 0 . Besides, the negative coupling constants also give reasonable physical solutions and increase of $$\alpha $$ α in negative directions suppresses the possible oscillation observed in the shock cone.

scholarly journals Dynamics of the nonrotating and rotating black hole scalarization

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Daniela D. Doneva ◽  
Stoytcho S. Yazadjiev
Keyword(s):  
Black Hole ◽  
Rotating Black Hole
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