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Black Hole Shadow in Symmergent Gravity

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arxiv 2110.11904 v2 pith:SKI5NLAY submitted 2021-10-21 gr-qc astro-ph.HEhep-phhep-th

İrfan Çimdiker , Durmuş Demir , Ali Övgün This is my paper · ORCID
classification gr-qcastro-ph.HEhep-phhep-th
keywords gravitysymmergentshadowblackfieldholeradiustheory
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abstract

Symmergent gravity is the $R+R^2$ gravity theory which emerges in a way restoring gauge symmetries broken explicitly by the ultraviolet cutoff in effective field theories. To test symmergent gravity we construct novel black hole solutions in four dimensions, and study their shadow in the vacuum as well as plasma medium. Our detailed analyses show that the horizon radius, Hawking temperature, Bekenstein-Hawking entropy, shadow angular radius, and photon deflection angle are sensitive probes of the symmergent gravity and particle spectrum of the underlying quantum field theory.

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  1. Spinning Particle Dynamics and Observational Redshift around an Asymptotically Flat Symmergent Black Hole

    gr-qc 2026-08 conditional novelty 5.0 of 10

    For a black hole in symmergent gravity, the sign of the boson-fermion imbalance determines whether particle and photon observables deviate from Schwarzschild smoothly (fermion-dominated) or in an oscillatory pattern (...

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