Evolution of imaging of black hole accretion-outflow system over half a century

Abstract

Light bending around black holes has a beautiful consequence on the image of accretion disks around black holes. The nature of disks around black holes has evolved from a static Keplerian disk to modern days dynamic advective flow models. As a result, the images of black holes have changed. Major efforts of producing simulated black hole images are briefly presented. Distinguishing event horizon from the disk will be one of the major discoveries of this century. Event Horizon Telescope (EHT) is getting prepared to discern the horizon of Sgr A* where radio interferometry technique has been deployed. For Galactic black holes, the required resolution is much higher and X-ray interferometry is essential.