Calculations show increasing charge Q and dilaton coupling a reduce photon sphere and shadow radii of dyon-like dilatonic black holes, enabling parameter constraints from M87* and SgrA* angular diameter observations.
Azreg-A¨ ınou, Physics Letters B730, 95 (2014)
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Shadow, Emission, and Strong-Field Lensing of Dilatonic Black Holes
Calculations show increasing charge Q and dilaton coupling a reduce photon sphere and shadow radii of dyon-like dilatonic black holes, enabling parameter constraints from M87* and SgrA* angular diameter observations.