A submillisecond pulsar and the equation of state of dense matter

Details A submillisecond pulsar and the equation of state of dense matter A submillisecond pulsar and the equation of state of dense matter

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.340..617h&link_type=abstract

Nature (ISSN 0028-0836), vol. 340, Aug. 24, 1989, p. 617-619.

Computer Science

Sound

94

Degenerate Matter, Equations Of State, Pulsars, Stellar Mass, Stellar Rotation, Neutron Stars, Stellar Models, Supernova 1987A

Scientific paper

If the submillisecond pulsar in the remnant of SN 1987A really is rotating stably with a period of 0.508 ms, its existence can be used to rule out nearly all 'realistic' equations of state for dense nuclear matter. A simple equation of state is presented here that yields, in the nonrotating case, maximally compact models of neutron stars, and it is argued that stars constructed in this way will also be stable when rotating with periods of less than 0.5 ms. Additional constraints found by applying the same equation of state to the 'slowly' rotating pulsar PSR1913 + 16, whose mass is accurately known, leaves only a small range of acceptable parameters for neutron star models based on equations of state that obey the causality requirement that their sound speeds are less than the speed of light.

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