In bursters, companions of neutron stars are old, low-mass stars, faint in brightness. The magnetic field of such neutron stars is weak. Accretion of matter occurs over the entire surface of a neutron star, and therefore there is no periodicity in X-ray radiation.
In pulsars, the companions of a neutron star with a strong magnetic field are young bright giant stars. The accretion of matter occurs only in the region of the poles of the neutron star. The rotation of such a neutron star could create a pulsar phenomenon.
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