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Timelike geodesics of a modified gravity black hole immersed in an axially symmetric magnetic field

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arxiv 1508.02123 v1 pith:MQJB76LP submitted 2015-08-10 gr-qc

Saqib Hussain , Mubasher Jamil This is my paper · ORCID
classification gr-qc
keywords blackholeparticlefieldmagneticgravitymodifiedpresence
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We investigate the dynamics of a neutral and a charged particle around a black hole in modified gravity immersed in magnetic field. Our focus is on the scalar-tensor-vector theory as modified gravity. We are interested to explore the conditions on the energy of the particle under which it can escape to infinity after collision with another neutral particle in the vicinity of the black hole. We calculate escape velocity of particle orbiting in the innermost stable circular orbit (ISCO) after the collision. We study the effects of modified gravity on the dynamics of particles. Further we discuss how the presence of magnetic field in the vicinity of black hole, effects the motion of the orbiting particle. We show that the stability of ISCO increases due to presence of magnetic field. It is observed that a particle can go arbitrary close to the black hole due to presence of magnetic field. Furthermore ISCO for black hole is more stable as compared with Schwarzschild black hole. We also discuss the Lyapunov exponent and the effective force acting on the particle in the presence of magnetic field.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Gravitational wave signatures of magnetized Ernst black hole

    gr-qc 2026-07 conditional novelty 4.0 of 10

    Magnetic fields in the Ernst black-hole spacetime alter zoom-whirl EMRI waveforms, spectra, and characteristic strain in ways the authors claim LISA-class detectors could probe.

  2. Influence of external magnetic fields on charged particle motion around a Schwarzschild-like black hole

    gr-qc 2025-06 reject novelty 4.0 of 10

    The paper derives ISCO radii, collision energies, and QPO frequencies for charged particles around a Schwarzschild-like black hole in an external magnetic field, but the dimensionless equations contain an internal inc...

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