White holes: formation and dynamics

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Einstein's theory of General Relativity allows for the possibility of the existence of remarkable and exotic macroscopic objects. Two examples are black holes and white holes. For the first, the evidence for their existence is overwhelming, and their properties have been studied in detail. White holes, on the other hand, have not received as much attention, and their existence is still an open question.

Although we have not had any confirmed detections, white holes are still solutions to Einstein's equations. These are truly strange objects that defy our physics, but so do black holes up to this day. That is why further study of the formation and dynamics of these objects is necessary. A better understanding may reveal important implications for black hole physics and cosmology, which can change our understanding of the universe.

In this thesis, we analyse a model for a white hole originating from an inverted Oppenheimmer-Snyder collapse. We study the possible solutions of this model, depending on the initial conditions. In addition, we study the dynamics of the white hole, with a first approach through the quasinormal modes. Finally, to compare our results with the state-of-the-art work, we review the more recent literature addressing quasinormal modes of a Schwarzschild white hole.