Particle acceleration near a rotating black hole in a Randall-Sundrum brane with a cosmological constant

2013 ◽  
Vol 88 (2) ◽  
Author(s):  
S. R. Shaymatov ◽  
B. J. Ahmedov ◽  
A. A. Abdujabbarov
Keyword(s):  
Black Hole ◽  
Particle Acceleration ◽  
Cosmological Constant ◽  
Rotating Black Hole

Energy extraction and particle acceleration around a rotating black hole in quintessence

2016 ◽  
Vol 361 (8) ◽  
Author(s):  
Tursinbay Oteev ◽  
Ahmadjon Abdujabbarov ◽  
Zdeněk Stuchlík ◽  
Bobomurat Ahmedov
Keyword(s):  
Black Hole ◽  
Particle Acceleration ◽  
Energy Extraction ◽  
Rotating Black Hole

scholarly journals Aschenbach effect for spinning particles in Kerr–(A)dS spacetime

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Ali Vahedi ◽  
Jafar Khodagholizadeh ◽  
Arman Tursunov
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Cosmological Constant ◽  
Test Particle ◽  
Critical Value ◽  
Frame Of Reference ◽  
Rotating Frame ◽  
Spinning Particles ◽  
Rotating Black Hole ◽  
Rotating Black Holes

AbstractA non-monotonic behavior of the velocity gradient of a test particle revolving around a rapidly rotating black hole in the locally non-rotating frame of reference is known as the Aschenbach effect. This effect can serve as a distinguishing signature of rapidly rotating black holes, being potentially useful for the measurements of the astrophysical black hole spins. This paper is the generalization of our previous research to the motion of spinning particles around a rotating black hole with non-zero cosmological constant. We show that both the particle’s spin s and the cosmological constant $$\Lambda $$ Λ modify the critical value of the black hole spin $$a_c$$ a c , for which the Aschenbach effect can be observed; $$a_c$$ a c can increase or decrease depending on the signs of s and $$\Lambda $$ Λ . We also found that the particle’s spin s can mimic the effect of the cosmological constant $$\Lambda $$ Λ for a given $$a_c$$ a c , causing thus a discrepancy in the measurements of s, $$\Lambda $$ Λ and $$a_c$$ a c in the Aschenbach effect.

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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