Artículos de revistas
Is SAX J1808.4-3658 a Strange Star?
Fecha
1999-11-08Registro en:
Physical Review Letters, v. 83, n. 19, p. 3776-3779, 1999.
0031-9007
10.1103/PhysRevLett.83.3776
WOS:000083546200008
2-s2.0-18344411261
Autor
Nanjing University
I.N.F.N. Sezione di Pisa
Presidency College
Universidade Estadual Paulista (Unesp)
Maulana Azad College
University of Amsterdam
Intl. Centre for Theoretical Physics
Institución
Resumen
The possibility of strange stars is one of the most important issues in the study of compact objects. Here we use the observations of the newly discovered millisecond x-ray pulsar SAX J1808.4-3658 to constrain the radius of the compact star. Comparing the mass-radius relation of SAX J1808.4-3658 with theoretical models for both neutron stars and strange stars, we argue that a strange star model could be more consistent with SAX J1808.4-3658, and suggest that it is a likely strange star candidate. Our results are useful in constraining microscopic chiral symmetry restoration parameters in the quantum chromodynamics (QCD) modeling of strange matter.