Speaker
Description
In this work we construct the shadow of an axially-symmetric compact object with the event horizon in five-dimensions, known as the rotating black string. Like a black hole, the black string spacetime is characterized by the mass and spin. However, an extra dimension
is flat and infinite. Black strings, as higher-dimensional objects, may contribute to the dark matter by mimicking its gravitational effects. We find that the size of the shadow of a black string is greater than that of a black hole of the same mass. Furthermore, the distortion of the shadow’s shape due to rotation is significantly influenced by the presence of an extra dimension, even when the rotation occurs in three spatial dimensions. These results provide clear, verifiable predictions that can be tested through high-resolution observations. Future Event Horizon Telescope (EHT) observations could play a crucial role in constraining our model and probing the existence of extra-dimensional theories of black holes.