The period of the crab pulsar is 33 ms and its observed value of T is 1263 years. Assuming the crab neutron star has a radius of 112km, and angle where magnetic dipole moment is inclined to the star rotation axis is 90, and a moment of inertia of 1045 gcm2, what is the approximate magnitude of the surface B necessary to account for the observed spin down of the crab pulsar? What is the power radiated?
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