• The evolution of the magnetic fields of neutron stars

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      https://www.ias.ac.in/article/fulltext/joaa/016/02/0217-0232

    • Keywords

       

      Neutron Stars; Pulsara; Magnetic Field

    • Abstract

       

      Observational evidence, and theoretical models of the magnetic field evolution of neutron stars is discussed. Observational data indicates that the magnetic field of a neutron star decays significantly only if it has been a member of a close interacting binary. Theoretically, the magnetic field evolution has been related to the processing of a neutron star in a binary system through the spin evolution of the neutron star, and also through the accretion of matter on the neutron star surface. I describe two specific models, one in which magnetic flux is expelled from the superconducting core during spin-down, via a copuling between Abrikosov fluxoids and Onsager-Feynman vortices; and another in which the compression and heating of the stellar crust by the accreted mass drastically reduces the ohmic decay time scale of a magnetic field configuration confined entirely to the crust. General remarks about the behaviour of the crustal field under ohmic diffusion are also made.

    • Author Affiliations

       

      Dipankar Bhattacharya1

      1. Raman Research Institute, Bangalore - 560 080
    • Dates

       
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