Is SAX J1808.4-3658 a Strange Star?

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Data

1999-11-08

Autores

Li, X. D.
Bombaci, I.
Dey, Mira
Dey, Jishnu [UNESP]
Van den Heuvel, E. P J

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American Physical Soc

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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.

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Physical Review Letters, v. 83, n. 19, p. 3776-3779, 1999.