BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Observers in black hole spacetimes: The inside story DTSTART:20211209T143000Z DTEND:20211209T163000Z DTSTAMP:20260906T155113Z UID:763e3ab8-cbbf-48e6-8e3e-22ed2a9b052e SEQUENCE:2 CREATED:20211207T101850Z DESCRIPTION:We consider several different aspects connected with propertie s of the motion of observers and particles inside the event horizon of a S chwarzschild black hole. We elucidate (i) how to maximize the observer 7\;s survival proper time and (ii) how to make the visible part of the out er universe as large as possible before the observer hits the singularity. We also consider the red and blueshifts of photons experienced by observe rs during their travel. We develop an approach that relates these properti es 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 moment um\, there exists an analogue of the Banados-Silk-West effect inside the h orizon. LAST-MODIFIED:20211207T162246Z LOCATION:Sala de Seminários do DF\, Pavilhão de Física\, 2º piso URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/observers-in-black-hole-sp acetimes-the-inside-story/ X-ALT-DESC;FMTTYPE=text/html:

We consider several different aspects connected with properties of the motion of observers an d particles inside the event horizon of a Schwarzschild black hole. We elu cidate (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 possibl e before the observer hits the singularity. We also consider the red and b lueshifts of photons experienced by observers during their travel. We deve lop an approach that relates these properties with the formalism of partic le collisions in a black hole spacetime and we show that for a special cla ss of observers\, the ones with zero momentum\, there exists an analogue o f the Banados-Silk-West effect inside the horizon.

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