Drakkith said:The magnetic fields of the Neutron stars are offset from their axis of spin similar to how the Earth's magnetic field is offset from true north/south.
See here: http://en.wikipedia.org/wiki/File:Pulsar_schematic.svg
Neutron stars are formed from the collapse of a massive star's core. As the star collapses, its rotation speeds up due to the conservation of angular momentum.
Neutron stars can spin incredibly fast, with some rotating hundreds of times per second. The fastest known neutron star, named PSR J1748-2446ad, spins at a rate of 716 times per second.
Yes, neutron stars can change their rotation speed through processes such as accretion of matter from a companion star or the release of energy through magnetic field interactions.
The rotation axis of a neutron star is the imaginary line passing through its north and south poles, around which the star rotates.
Scientists use a technique called pulsar timing to measure the rotation rate of a neutron star. This involves tracking the regular pulses of electromagnetic radiation emitted by the neutron star and analyzing any variations in the timing of these pulses to determine the rotation rate and axis.