Production et oscillation des particules de type axion dans les magnétoiles

Authors: Gratton, Marianne
Advisor: Fortin, Jean-FrançoisMarleau, Luc
Abstract: This project studies the implications of the existence of axion like particles (ALPs) in magnetars. Indeed, such dense and hot stars are ideal to produce ALPs, and their strong magnetic field is essential to ALP-photon oscillations. In addition to giving insight on the strong CP problem and dark matter, the existence of ALPs could shed light on other aspects of magnetars such as their hard X ray emission and their internal temperature. The luminosity in photons associated to ALP production is thus compared with the hard X ray flux emitted by real stars. As a result, the internal temperatures modelized are lower, which is more consistent with the observed life times. Regarding the ALPs' strength of interactions, the predicted values are less coherent and too high when compared with experimental evidence. However, it is still possible to obtain an agreement between five out of six data sets. ALPs production inside magnetars is thus not totally incoherent with observations, but the model must be developped further before significant conclusions can be drawn.
Document Type: Mémoire de maîtrise
Issue Date: 2022
Open Access Date: 18 July 2022
Grantor: Université Laval
Collection:Thèses et mémoires

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