Quark matter in high-mass neutron stars?

Journal Article · Tue Sep 15 04:00:00 EDT 2015 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S1063779615050159· OSTI ID:22977416

Blaschke, D. ^[1]; Fischer, T.; Klähn, T. ^[1]

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1. Instytut Fizyki Teoretycznej, Uniwersytet Wrocławski, Wrocław (Poland)

The recent measurements of the masses of the pulsars PSR J1616-2230 and PSR J0348-0432 provide independent proof for the existence of neutron stars with masses in range of 2M{sub ⊙}. This fact has significant implications for the physics of high density matter and it challenges the hypothesis that the cores of NS can be composed of deconfined quark matter. In this contribution we study a description of quark matter based on the Nambu—Jona-Lasinio effective model and construct the equation of state for matter in beta equilibrium. This equation of state together with the hadronic Dirac–Brueckner—Hartree—Fock equation of state is used here to describe neutron star and hybrid star configurations. We show that compact stars masses of 2M{sub ⊙} are compatible with the possible existence of deconfined quark matter in their core.

• OSTI ID: 22977416
• Journal Information: Physics of Particles and Nuclei, Journal Name: Physics of Particles and Nuclei Journal Issue: 5 Vol. 46; ISSN 1063-7796
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EQUATIONS OF STATE
NEUTRON STARS
QUARK MATTER
QUARKS