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dc.contributor Witek, Helvi
dc.creator Creci, Gastón
dc.date 2017-10-25T17:15:35Z
dc.date 2017-10-25T17:15:35Z
dc.date 2017-06
dc.date.accessioned 2024-12-16T10:25:45Z
dc.date.available 2024-12-16T10:25:45Z
dc.identifier http://hdl.handle.net/2445/117111
dc.identifier.uri http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/19963
dc.description Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2017, Tutor: Helvi Witek
dc.description We solve the Klein-Gordon equation for an axion field in a Kerr background analytically for M [mu] << 1 and M [omega] << 1 for small spins via matching the near and far region solutions. This yields a hydrogen-like frequency spectrum and, if the superradiance condition is met, an instability. Moreover, we discuss some physically relevant elements of our system such as the potential associated to a black hole, the superradiance rate or the flux at the event horizon, comparing them with the numerical solution where our approximations are no longer valid.
dc.format 5 p.
dc.format application/pdf
dc.language eng
dc.rights cc-by-nc-nd (c) Creci, 2017
dc.rights http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights info:eu-repo/semantics/openAccess
dc.source Treballs Finals de Grau (TFG) - Física
dc.subject Forats negres (Astronomia)
dc.subject Treballs de fi de grau
dc.subject Black holes (Astronomy)
dc.subject Bachelor's theses
dc.title Black holes and axions
dc.type info:eu-repo/semantics/bachelorThesis


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