First Image of the Black Hole Shadow in the Galactic Center - Sagittarius A*

Explore the groundbreaking first image of the black hole shadow in the Galactic Center in this 58-minute lecture by Dr. Maciej Wielgus from the Max Planck Institute for Radio Astronomy. Delve into the challenges of obtaining high-resolution images of Sagittarius A* using the Event Horizon Telescope, a global network of radio telescopes operating at 230 GHz. Examine the theoretical interpretation of these images within the black hole accretion theory framework and evaluate the evidence supporting Sagittarius A* as a Kerr black hole. Learn about source variability, horizon telescope data, spectral index, orbital models, image selection processes, and various constraints and measurements used in modeling. Gain insights into the Delta Factor and its role in understanding this supermassive compact object at the center of the Milky Way.

Intro
Source variability
Horizon telescope data
What do we learn
Spectral index
Orbital model
Choosing the image
What can we infer
Constraints
Models
Measurements
Delta Factor
Modeling