Blackholes unveiled: from quasinormal scillations to shadows
21 OCT 2020
13:30 - 15:00
From the observational point of view, blackholes (BHs) appear in a wide variety of astrophysical environments, and there is wealth of direct or indirect evidence pointing towards the existence of supermassive black holes (SMBHs). In fact, it is believed that SMBHs reside in the center of most sufficiently massive galaxies, including ours. It is also believed that the result of gravitational collapse is a Kerr BH. However, I’ll explain the concept of the generalized blackholes and explain their two most important observational imprints, namely quasinormal oscillations and shadows. For the quasinormal oscillations we study the effect of the quadrupole and for shadows we consider the magnetic charge and scalar hair. We constrain the magnetic charge and scalar hair with bounds given by the event horizon telescope.
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