Modeling hybrid stars with an SU(3) nonlinear {sigma} model

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.035803· OSTI ID:21419567

Negreiros, Rodrigo; Dexheimer, V A; Schramm, S ^[1]

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1. Frankfurt Institute for Advanced Studies, Goethe University, Ruth Moufang Strasse 1, D-60438 Frankfurt am Main (Germany)

We study the behavior of hybrid stars by using an extended hadronic and quark SU(3) nonlinear sigma model. The degrees of freedom change naturally, in this model, from hadrons to quarks as the density/temperature increases. At zero temperature, we reproduce massive neutron stars, which contain cores of hybrid matter of 2 km for the nonrotating case and 1.18 and 0.87 km, in the equatorial and polar directions, respectively, for stars that rotate at the Kepler frequency (physical cases lie in between). The cooling of such stars is also analyzed.

• OSTI ID: 21419567
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevC.82.035803; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DEGREES OF FREEDOM
DENSITY
HADRONS
NEUTRON STARS
NONLINEAR PROBLEMS
QUARKS
SIGMA MODEL
SIMULATION
SU-3 GROUPS
BOSON-EXCHANGE MODELS
ELEMENTARY PARTICLES
FERMIONS
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
PERIPHERAL MODELS
PHYSICAL PROPERTIES
STARS
SU GROUPS
SYMMETRY GROUPS