The Glorious Past of Our Monster Black Hole
Dr. Shuo Zhang, 1:00 – 1:30pm in 37-252
The center of our Galaxy resides a monster black hole, called Sagittarius A* (or Sgr A*), containing 4.5 million times the mass of our sun. While Sgr A* is quite inactive nowadays, there have been abundant observation evidence pointing to a glorious past of this supermassive black hole. Sgr A* has been inferred to produce major outbursts a few hundred years ago, and even more extreme eruptions a few million years ago. What is the physics behind such extreme bahavious of the Galactic center supermassive black hole? Will it become active again in the future? This talk will answer these questions by discussing the past activities and future fate of Sgr A*.