Optical Signatures of Einstein-Euler-Heisenberg AdS/dS Black Holes in the light of Event Horizon Telescope

Khadije Jafarzade, Zeynab Bazyar, Sara Saghafi +1

Recent observations of the supermassive black holes $M87^{\ast }$ and Sgr A${}^{\ast }$ by the Event Horizon Telescope (EHT) have sparked intensified interest in studying the optical appea…