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Title: Decay of Pulsar's Magnetic Fields Via Neutrino Emission Processes
???metadata.dc.contributor.*???: Dr. Remudin Reshid
Bezabh, Tsegay
Issue Date: Oct-2017
Publisher: Addis Ababa University
Abstract: Currently, there is no clear understanding of how pulsar magnetic elds decay. This is the motivation behind the development of this particular model for pulsar eld dissipation. In this work we develop a theoretical model for surface magnetic elds of neutron stars (NSs) based on spinning separated charges that arise as a result of plasma di usion processes inside NS matter [1]. As was described in this model, we have pointed out that such kinds of magnetic elds will be temperature dependent, and should decay primarily as a result of neutrino emissions. In this work we have formulated magnetic eld decay law associated with neutrino emission process correspondingly the NSs cooling curve. Based on the above model, the magnetic eld derived from this law is shown to be consistent with observations from typical young pulsars, like crab and vela young ones. We have also explored the possible implications of the results such as the observed variations and possible time evolution of pulsar braking indices are also discussed.
Description: A Thesis Submitted to the School of Graduate Studies of Addis Ababa University in Partial Fulfillment of the Requirements for the Degree of Master of Science in Physics
Appears in Collections:Thesis - Physics

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