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

Oteev, Tursinbay; Abdujabbarov, Ahmadjon; Stuchlík, Zdeněk; Ahmedov, Bobomurat

doi:10.1007/s10509-016-2850-9

Cited by 40 publications

(36 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The universe accelerating expansion demands the state parameter to be in range −1 < ω < −1/3. The recent works generalized this result to Kerr black hole by Janis-Newman algorithm (Ghosh (2016);Toshmatov et al (2015)), and the spacetime metric were studied (Hussain & Ali (2016);Oteev et al (2016); Schee & Stuchlik (2016)). Following these works, we generalize Kerr black hole solutions to Kerr-Newman black hole solutions in quintessential dark energy.…”

Section: Introductionmentioning

confidence: 95%

Kerr-Newman-AdS black hole in quintessential dark energy

Wang

2017

Phys. Rev. D

View full text Add to dashboard Cite

Quintessential dark energy with pressure p and density ρ is related by equation of state p = ωρ with the state parameter −1 < ω < −1/3. The cosmological dark energy influence on black hole spacetime are interesting and important. In this paper, we study the Kerr-Newman-AdS solutions of the Einstein-Maxwell equation in quintessence field around a black hole by Newman-Janis algorithm and complex computations. From the horizon structure equation, we obtain the expression between quintessence parameter α and cosmological constant Λ if the black hole exists two cosmological horizon r q and r c when ω = −2/3, the result is different from rotational black hole in quintessence matter situation. Through analysis we find that the black hole charge cannot change the value of α. But the black hole spin and cosmological constant are opposite. The black hole spin and cosmological constant make the maximum value of α to become small. The existence of four horizon leads seven types of extremal black holes to constraint the parameter α. With the state parameter ω ranging from −1 to −1/3, the maximum value of α changes from Λ to 1. When ω → −1, the quintessential dark energy likes cosmological constant. The singularity of the black holes is the same with that of Kerr black hole. We also discuss the rotation velocity of the black holes on the equatorial plane for ω = −2/3, −1/2 and −1/3. For small value of α, the rotation velocity on the equatorial plane is asymptotically flat and it can explain the rotation curves in spiral galaxies.

show abstract

Section: Introductionmentioning

confidence: 95%

Kerr-Newman-AdS black hole in quintessential dark energy

Wang

2017

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…The black hole immersed in magnetic field has been studied in the pioneering work of Wald [21]. After that, numerous studies have been devoted to the electromagnetic field around various black holes and particle motion in external magnetic field (see e.g.,) [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

“…Magnetized particle motion around non-Schwarzschild black holes immersed in an external uniform magnetic field has been recently studied in [44]. Acceleration of magnetized particles around rotating black holes in quintessence and high energy collision of magnetized particles around a Hořava-Lifshitz black hole have been studied in [29,30]. Magnetized particles acceleration around a Schwarzschild black hole in a magnetic field has been analyzed in [32].…”

Section: Introductionmentioning

confidence: 99%

“…The Penrose process [47], Blandford-Znajeck mechanism [48], Magnetic Penrose process [49][50][51][52] and particle acceleration mechanism (BSW) [53] are several of them which can be used for modelling the high energetic processes of active galactic nuclei and other X-ray sources. The energetic processes around black holes in different scenarios in alternative and modified theories of gravity have been extensively studied e.g., in [27,29,[31][32][33][34]36,[54][55][56].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

et al. 2020

Self Cite

View full text Add to dashboard Cite

Magnetized particle motion around black holes in conformal gravity immersed in asymptotically uniform magnetic field has been studied. We have also analyzed the behavior of magnetic fields near the horizon of the black hole in conformal gravity and shown that with the increase of conformal parameters L and N the value of angular component of magnetic field at the stellar surface decreases. The maximum value of the effective potential corresponding to circular motion of the magnetized particle increases with the increase of conformal parameters. It is shown that in all cases of neutral, charged and magnetized particle collisions in the black hole environment the center-of-mass energy decreases with the increase of conformal parameters L and N. In the case of the magnetized and negatively charged particle collisions, the innermost collision point with the maximum center-of-mass energy comes closer to the central object due to the effects of the parameters of the conformal gravity. We have applied the results to the real astrophysical scenario when a pulsar treated as a magnetized particle is orbiting the super massive black hole (SMBH) Sgr A* in the center of our galaxy in order to obtain the estimation of magnetized compact object’s orbital parameter. The possible detection of pulsar in Sgr A* close environment can provide constraints on black hole parameters. Here we have shown that there is degeneracy between spin of SMBH and ambient magnetic field and consequently the interaction of magnetic field ∼ 10 2 Gauss with magnetic moment of magnetized neutron star can in principle mimic spin of Kerr black holes up to 0.6 .

show abstract

“…These mechanisms can be used to explain the high energetic particle extraction from active galactic nuclei (AGNs) where supermassive black holes could be located. Motivated by this, the energetic processes around BHs in different scenarios in extended theories of gravity have been recently studied in [4,5,9,[27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

et al. 2020

Self Cite

View full text Add to dashboard Cite

In the present work we explored the dynamics of magnetized particles around the compact object in γ-spacetime in the presence of an external asymptotically-uniform magnetic field. The analysis of the circular orbits of magnetized particles around the compact object in the spacetime of a γ-object immersed in the external magnetic field has shown that the area of stable circular orbits of magnetized particles increases with the increase of γ-parameter. We have also investigated the acceleration of the magnetized particles near the γ-object and shown that the center-of-mass energy of colliding magnetized particles increases with the increase of γ-parameter. Finally, we have applied the obtained results to the astrophysical scenario and shown that the values of γ-parameter in the range of γ∈(0.5,1) can mimic the spin of Kerr black hole up to a≃0.85, while the magnetic interaction can mimic the γ-parameter at γ∈(0.8,1) and spin of a Kerr black hole up to a≃0.3.

show abstract

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

Cited by 40 publications

References 43 publications

Kerr-Newman-AdS black hole in quintessential dark energy

Kerr-Newman-AdS black hole in quintessential dark energy

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

Contact Info

Product

Resources

About