Hamilton Colloquium Series, Ramesh Narayan, Harvard University, "The Black Hole at Our Galactic Center" Feb 9, Jadwin A10

Feb 9, 2023, 4:00 pm5:00 pm
A free lecture open to the public.



Event Description

At the center of our Milky Way Galaxy lives a compact massive object called Sagittarius A* (Sgr A*) which is believed to be a black hole. Its mass, as inferred from the orbits of gravitationally bound stars as well as from direct images obtained by the Event Horizon Telescope, is 4 million solar masses. Gas accreting gravitationally on Sgr A* is in an unusual regime of plasma physics whose properties are the focus of the accompanying joint PGI/PCTS Workshop. While it seems highly likely that Sgr A* is indeed a black hole, with an event horizon, it would be wise to ask if alternative models are also viable. The talk will describe efforts to eliminate some of the alternatives.

Department of Physics