Although astronomers predict that the gaseous shells left over from supernova explosions should hold rapidly-spinning radio pulsars, few such stars have actually been observed within these nebulae. Astronomers from Columbia University and the California Institute of Technology propose an explanation: The expected pulsars do exist, but they are slowly spinning neutron stars invisible to radio probes and have magnetic fields a quadrillion times denser that that of our Sun -- so-called "magnetars."
The above story is based on materials provided by Columbia University. Note: Materials may be edited for content and length.
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