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Title: Hyperons and nuclear symmetry energy in neutron star matter

Abstract

In this work, masses and radii of neutron stars are considered to investigate the effect of nuclear symmetry energy on astrophysical observables. A relativistic mean-field model with density-dependent meson-baryon coupling constants is employed in describing the equation of state of dense nuclear matter, and the density dependencies of the symmetry energies are quoted from the recent phenomenological formulas obtained from heavy-ion data at subnuclear saturation densities. Since hyperons can take part in the {beta}-equilibrium of the dense matter inside neutron stars, we include hyperons in our estimation and their roles are discussed in combination with that of the nuclear symmetry energy.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Hanyang University, Seoul 133-791 (Korea, Republic of)
  2. Department of Physics Education, Daegu University, Gyeongsan 712-714 (Korea, Republic of)
  3. Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21596796
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.84.035809; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COUPLING CONSTANTS; DENSITY; EQUATIONS OF STATE; EQUILIBRIUM; HEAVY IONS; HYPERONS; MASS; MEAN-FIELD THEORY; MESONS; NEUTRON STARS; NUCLEAR MATTER; RELATIVISTIC RANGE; SATURATION; SYMMETRY; BARYONS; BOSONS; CHARGED PARTICLES; ELEMENTARY PARTICLES; ENERGY RANGE; EQUATIONS; FERMIONS; HADRONS; IONS; MATTER; PHYSICAL PROPERTIES; PHYSICS; STARS; STRANGE PARTICLES

Citation Formats

Ryu, Chung-Yeol, Hyun, Chang Ho, and Lee, Chang-Hwan. Hyperons and nuclear symmetry energy in neutron star matter. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.035809.
Ryu, Chung-Yeol, Hyun, Chang Ho, & Lee, Chang-Hwan. Hyperons and nuclear symmetry energy in neutron star matter. United States. doi:10.1103/PHYSREVC.84.035809.
Ryu, Chung-Yeol, Hyun, Chang Ho, and Lee, Chang-Hwan. Thu . "Hyperons and nuclear symmetry energy in neutron star matter". United States. doi:10.1103/PHYSREVC.84.035809.
@article{osti_21596796,
title = {Hyperons and nuclear symmetry energy in neutron star matter},
author = {Ryu, Chung-Yeol and Hyun, Chang Ho and Lee, Chang-Hwan},
abstractNote = {In this work, masses and radii of neutron stars are considered to investigate the effect of nuclear symmetry energy on astrophysical observables. A relativistic mean-field model with density-dependent meson-baryon coupling constants is employed in describing the equation of state of dense nuclear matter, and the density dependencies of the symmetry energies are quoted from the recent phenomenological formulas obtained from heavy-ion data at subnuclear saturation densities. Since hyperons can take part in the {beta}-equilibrium of the dense matter inside neutron stars, we include hyperons in our estimation and their roles are discussed in combination with that of the nuclear symmetry energy.},
doi = {10.1103/PHYSREVC.84.035809},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}