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Contribution of multipolar electromagnetic fields to the radio and high energy emission of pulsars

Abstract : Studying the electromagnetic field around neutron stars is one of the vital methods to understand the physics of the pulsars. While major literature uses assumption of a standard centred dipolar electromagnetic field, recent studies have focused on including higher multipolar field components and have presented a more generalized picture for pulsars in which the magnetic dipole moment is shifted off from the centre of the star. This work discusses the consequences of an off centred rotating magnetic dipole in vacuum by showing various characteristic features of magnetic field lines and pulsar emission. A broadband spectrum study of pulsar radiation is also laid out by creating maps of different emission regions of pulsars distinguished on the basis of their frequency with the main aim of looking for the evolution of the pulse profile with frequency. The thesis presents all the above results accompanied by the necessary discussions to understand the theoretical models used and the details of the numerical methods applied.
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Anu Kundu. Contribution of multipolar electromagnetic fields to the radio and high energy emission of pulsars. Other. Université de Strasbourg, 2018. English. ⟨NNT : 2018STRAE014⟩. ⟨tel-01978785⟩

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