Remarks on the light ring images and the optical appearance of hairy black holes in Einstein–Maxwell-dilaton gravity

Abstract The behaviors of null geodesics in the spherical symmetric black holes in Einstein–Maxwell-dilaton (EMD) theory with coupling function $$f(\Phi )=e^{-2\alpha \Phi }$$ f ( Φ ) = e - 2 α Φ are meticulously analyzed. We investigate the effects of coupling constant $$\alpha $$ α on the effectiv...

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Bibliographic Details
Main Authors: Chatchai Promsiri, Weerawit Horinouchi, Ekapong Hirunsirisawat
Format: Article
Language:English
Published: SpringerOpen 2024-09-01
Series:European Physical Journal C: Particles and Fields
Online Access:https://doi.org/10.1140/epjc/s10052-024-13258-8
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