Speaker: Oleg B. Zaslavskii (V. N. Karazin Kharkov University, Ukraine)
Title: Observers in black hole spacetimes: The inside story
We consider several different aspects connected with properties of the motion of observers and particles inside the event horizon of a Schwarzschild black hole. We elucidate (i) how to maximize the observer's survival proper time and (ii) how to make the visible part of the outer universe as large as possible before the observer hits the singularity. We also consider the red and blueshifts of photons experienced by observers during their travel. We develop an approach that relates these properties with the formalism of particle collisions in a black hole spacetime and we show that for a special class of observers, the ones with zero momentum, there exists an analogue of the Banados-Silk-West effect inside the horizon.
Room: Sala de Reuniões e Seminários (2-8.3) (2nd Floor of Physics Building)