Abstract:
The investigation of black holes and naked singularity shadows has attracted much at
tention in modern astrophysics research. The shadow of blackiholes in the presenceiof
plasma and naked singularities will be computed in this dissertation. We will observe the
propagation of light in a non-magnetizediplasma aroundia Kerr and Ker MOG blackihole.
Particularly, we formulate an analytical formula for the boundary curves ofishadow on
the observer’s sky, regardless of where they are in the outer communication domain. The
shadow’s shape and size that is observed varies based on plasma properties. Recently
the Event HorizoniTelescope’s direct imaging of supermassive black holes (SMBHs) at
the event horizon scaling factors, allows for testingialternative models to supermassive
black holes such as Kerrinaked singularities (KNSs) and Kerr MOG naked singulari
ties (KMNSs). Theishadow of KNSs and KMNSs can be utilized to assess the cos
micicensorship theory, and KNSs and KMNSs can be used as substitute models for
SMBHs by comparing them with black holeishadow measurements.
