Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30
- Dipartimento di Fisica, Universita di Pisa and INFN Sezione di Pisa, Piazza Torricelli 2, I-56100 Pisa (Italy)
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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 515666
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 55; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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