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Shadows of black holes in dynamical Chern-Simons modified gravity

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arxiv 2403.13062 v2 pith:ZJRMLYTL submitted 2024-03-19 gr-qc

Benito Rodríguez , Javier Chagoya , C. Ortiz This is my paper · ORCID
classification gr-qc
keywords chern-simonsblackgravitymodifiedshadowagreementapproximationsaround
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We revisit and extend the study of null geodesics around a slowly rotating black hole in Chern-Simons modified gravity. We employ the Hamilton-Jacobi formalism to derive the equations for the shadow profile and determine its shape. We compare our results with numerical ray tracing, finding good agreement within the validity of our approximations for slow rotation and small Chern-Simons coupling. We forecast constraints on the model parameters using the uncertainty in EHT data for the observed shadow of SgrA* as a reference.

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  1. Shadows of generalised Hayward spacetimes : in vacuum and with plasma

    gr-qc 2024-11 conditional novelty 6.0 of 10

    Shadows of generalized Hayward spacetimes are computed in vacuum and plasma, and EHT Sgr A* constraints favor wormholes with multi-peak effective potentials over single-peak ones.

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