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Quasinormal Modes of Modified Gravity (MOG) Black Holes

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arxiv 1711.03199 v2 pith:VEKBE6V5 submitted 2017-11-08 gr-qc

Luciano Manfredi , Jonas Mureika , John Moffat This is my paper · ORCID
classification gr-qc
keywords alphablackgravitationalgravitymodesmodifiedomegaqnms
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abstract

The Quasinormal modes (QNMs) for gravitational and electromagnetic perturbations are calculated in a Scalar-Tensor-Vector (Modified Gravity) spacetime, which was initially proposed to obtain correct dynamics of galaxies and galaxy clusters without the need for dark matter. It is found that for the increasing model parameter $\alpha$, both the real and imaginary parts of the QNMs decrease compared to those for a standard Schwarzschild black hole. On the other hand, when taking into account the $1/(1+\alpha)$ mass re-scaling factor present in MOG, Im($\omega$) matches almost identically that of GR, while Re($\omega$) is higher. These results can be identified in the ringdown phase of massive compact object mergers, and are thus timely in light of the recent gravitational wave detections by LIGO.

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Cited by 4 Pith papers

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

  1. Spherical photon orbits around Kerr-MOG black hole

    gr-qc 2024-12 conditional novelty 5.0 of 10

    Spherical photon orbits around Kerr-MOG black holes are classified, with a critical inclination angle switching the number of orbits from four to two.

  2. Influence of the Vacuum Polarization Effect on the Motion of Charged Particles in the Magnetic Field around a Schwarzschild Black Hole

    gr-qc 2019-08 reject novelty 5.0 of 10

    If vacuum polarization non-minimally couples magnetic fields to gravity, charged particle trajectories around Schwarzschild black holes can shift from unbound to bound, especially near the horizon.

  3. Shadows and accretion disk images of charged rotating black hole in modified gravity theory

    gr-qc 2024-11 conditional novelty 4.0 of 10

    Ray-traced images of the Kerr-Newman-MOG black hole show that the MOG parameter α enlarges and rounds the shadow, and its effect beats that of the electric charge Q.

  4. An overview of quasinormal modes in modified and extended gravity

    gr-qc 2019-08 conditional novelty 4.0 of 10

    Using a uniform sixth-order WKB method, the authors map how quasinormal mode frequencies and damping rates shift from general relativity in five modified gravity models, finding model-specific patterns.

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