Wetro, Legesse (PhD)Kifle, Mekuanint2018-06-282023-11-092018-06-282023-11-092007-07http://10.90.10.223:4000/handle/123456789/4697Due to the existence of both observational and theoretical evidences for the presence of non-dipolar NS magnetic fields, it has become more and more clear that neutron stars posses magnetic field structures, which are much more complicated than the simple assumption of a dipolar neutron star (NS) magnetic field. This thesis intends to show the presence of non-dipolar component of the NS magnetic fields as derived from a recent model by kebede[5]. We will derive both the dipolar and non dipolar components of the field separately. We approach the problem by applying Post-Newtonian approximation, to find the angle dependent charge distribution on the surface of the neutron star, which results in the non dipolar components of the NS magnetic fieldenNeutron Star Magnetic FieldsThesis