295 research outputs found
Tabulated Neutron Star Equations of State Modeled within the Chiral Mean Field Model
In this special issue article, I review some of the accomplishments of the
chiral mean field (CMF) model, which contains nucleon, hyperon, and quark
degrees of freedom, and its applications to proto-neutron and neutron stars. I
also present a set of equation of state and particle population tables built
using the CMF model subject to physical constraints necessary to reproduce
different environments, such as those present in cold neutron stars,
core-collapse supernova explosions and different stages of compact star
mergers.Comment: PASA special issue on the Neutron Stars, related to the Compstar
conference in Warsa
Compact Stars in Hadron and Quark-Hadron Models
We investigate strongly interacting dense matter and neutron stars using a
flavor-SU(3) approach based on a non-linear realization of chiral symmetry as
well as a hadronic flavor-SU(2) parity-doublet model. We study chiral symmetry
restoration and the equation of state of stellar matter and determine neutron
star properties using different sets of degrees of freedom. Finally, we include
quarks in the model approach. We show the resulting phase diagram as well as
hybrid star solutions for this model.Comment: conference proceedings Iwara 200
Parity Doublet Model applied to Neutron Stars
The Parity doublet model containing the SU(2) multiplets including the
baryons identified as the chiral partners of the nucleons is applied for
neutron star matter. The chiral restoration is analyzed and the maximum mass of
the star is calculated.Comment: Proceeding to the conference International Symposium on Exotic States
of Nuclear Matte
Modelling Hybrid Stars in Quark-Hadron Approaches
The density in the core of neutron stars can reach values of about 5 to 10
times nuclear matter saturation density. It is, therefore, a natural assumption
that hadrons may have dissolved into quarks under such conditions, forming a
hybrid star. This star will have an outer region of hadronic matter and a core
of quark matter or even a mixed state of hadrons and quarks. In order to
investigate such phases, we discuss different model approaches that can be used
in the study of compact stars as well as being applicable to a wider range of
temperatures and densities. One major model ingredient, the role of quark
interactions in the stability of massive hybrid stars is discussed. In this
context, possible conflicts with lattice QCD simulations are investigated.Comment: Contribution to the EPJA Topical Issue on "Exotic Matter in Neutron
Stars
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