When a massive star dies as a supernova, it can leave behind a pulsar, a rapidly spinning neutron star. The fastest pulsars can spin upwards of 700 times a second, blasting out regular pulses of energy. In a new paper, researchers propose that the fastest-spinning pulsars could contain quark matter in their cores. This would be even denser matter than neutrons and help explain how surprisingly massive neutron stars can spin so rapidly, maybe reaching 1,000 Hz.


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Source: Do the Fastest Spinning Pulsars Contain Quark Matter?