80 years of black holes: Oppenheimer-Snyder gravitational collapse and thin shell collapse
Presenting author: Jose Sande Lemos
Abstract: In 1939 Oppenheimer and Snyder discovered black holes by putting an interior collapsing Friedmann universe coupled to an exterior Schwarzschild spacetime, noticing the formation of an event horizon behind which all was hidden to the outside world. Here, a massive thin shell, with Minkowski interior and Schwarzschild exterior, collapsing from infinity, is used to show all the important properties of gravitational collapse and consequent event horizon and black hole formation. Moreover, in the cases in which the total spacetime mass is larger than the shell's proper mass, the limit of a zero total mass thin shell spacetime displays properties similar to Choptwick's collapse of a scalar field.
Oral presentation: yes. Poster: no.