Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30

Details Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30 Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvc..55.1587b&link_type=abstract

Physical Review C (Nuclear Physics), Volume 55, Issue 3, March 1997, pp.1587-1590

Physics

Nuclear Physics

49

Neutron Stars, Nuclear Matter, Nuclear Matter Aspects Of Neutron Stars, X-Ray Sources, X-Ray Bursts

Scientific paper

We present systematic calculations of the mass-radius (MR) relation of a neutron star (NS) using a large variety of modern equations of state (EOS) of dense matter. The role of strangeness on the EOS and on the MR relation is particularly emphasized. Theoretical results are then compared with the semiempirical MR relation recently extracted for the x-ray burst source 4U 1820-30. Based on this comparison, we propose that the compact object in 4U 1820-30 is a kaon-condensed nucleon star or a strange star.

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