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.
Autori interni: | |
Autori: | LI X.-D; BOMBACI I; DEY M; DEY J; VAN DEN HEUVEL E.P.J |
Titolo: | Is SAX J 1808.4 -3658 a strange star? |
Anno del prodotto: | 1999 |
Digital Object Identifier (DOI): | 10.1103/PhysRevLett.83.3776 |
Appare nelle tipologie: | 1.1 Articolo in rivista |