Decay of Pulsar's Magnetic fields Via Neutrino Emission Processes
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Date
2017-10
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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
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Keywords
Neutrino Emission Processes