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Gravitational Lensing by Black Holes in Einstein Quartic Gravity

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arxiv 2007.05341 v1 pith:L7QMPTQC submitted 2020-07-08 gr-qc

H. Khodabakhshi , Robert B. Mann This is my paper · ORCID
classification gr-qc
keywords blackeinsteingravityholeslensingeffectsgravitationalpredictions
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We investigate gravitational lensing effects of spherically symmetric black holes in Einstein Quartic Gravity (EQG). Using an approximate analytic solution obtained by continued fraction methods we consider the predictions of EQG for lensing effects by supermassive black holes at the center of our galaxy and others in comparison with general relativity (GR). We numerically compute both time delays and angular positions of images and find that they can deviate from GR by as much as milliarcseconds, suggesting that observational tests of EQG are feasible in the near future. We discuss the challenges of distinguishing the predictions of EQG from those of Einstein Cubic Gravity.

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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. Signatures of cubic gravity in the strong regime

    gr-qc 2025-02 conditional novelty 5.0 of 10

    Einsteinian cubic gravity shrinks (grows) black hole horizons for positive (negative) coupling and shifts the photon sphere enough that SgrA* shadow observations can bound the coupling to approximately 0.1.

  2. Analyzing Deflection Angles and Photon Sphere Dynamics of Magnetically Charged Black Holes in Nonlinear Electrodynamic

    gr-qc 2025-02 reject novelty 4.0 of 10

    A new closed-form weak deflection angle and shadow analysis for a magnetically charged NED black hole, with strong-field results that reduce to Schwarzschild after a mass redefinition.

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