Seminars

50 YEARS OF ENERGY EXTRACTION FROM ROTATING BLACK HOLE: REVISITING THE MAGNETIC PENROSE PROCESS

In 1969 Penrose proposed a process by which¬†a black hole’s rotational energy could be extracted by invoking a purely geometric property of Kerr spacetime. I will review how this process, beginning as a thought experiment, has evolved in 50 years as one of the most successful powering engines for high energy sources like quasars and AGNs.