Physics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9025710g&link_type=abstract
Presented at the 6th Workshop on Nuclear Dynamics, Jackson Hole, WY, 17-24 Feb. 1990
Physics
Ground State, Light Curve, Neutron Stars, Pulsars, Supernova 1987A, B Stars, Gravitation, Hadrons, Neutrinos, Quarks, Stellar Rotation
Scientific paper
The initial motivation for this work was the reported discovery in January 1989 of a 1/2 millisecond pulsar in the remnant of the spectacular supernova, 1987A. The status of this discovery has come into grave doubt as of data taken by the same group in February, 1990. At this time researchers must consider that the millisecond signal does not belong to the pulsar. The existence of a neutron star in remnant of the supernova is suspected because of recent observations on the light curve of the remnant, and of course by the neutrino burst that announced the supernova. However its frequency is unknown. A strong case can be made that a pulsar rotation period of about 1 ms divides those that can be understood quite comfortably as neutron stars, and those that cannot. It will soon be discovered as to whether there is an invisible boundary below which pulsar periods do not fall, in which case, all are presumable neutron stars, or whether there exist sub-millisecond pulsars, which almost certainly cannot be neutron stars. Their most plausible structure is that of a self-bound star, a strange-quark-matter star. The existence of such stars would imply that the ground state of the strong interaction is not, as researchers usually assume, hadronic matter, but rather strange quark matter. Researchers look respectively at stars that are bound only by gravity, and hypothetical stars that are self-bound, for which gravity is so to speak, icing on the cake.
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