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DS(CMF)-6 with crust

Abstract

The relativistic SU(3) Chiral Mean Field (CMF) model was the first model developed with the intent of describing several systems, among which are the interior of neutron and proto-neutron stars. More specifically it is a non-linear realization of the sigma model which includes pseudo-scalar mesons as the angular parameters for the chiral transformation. Depending on the choice of degrees of freedom, it can include nucleons, hyperons, spin 3/2 (Delta) baryons, light quarks, free leptons and mesons. The model reproduces standard nuclear physical constraints, as well as astrophysical ones, such as massive neutron stars. The quark sector of the model was fitted to reproduce lattice QCD results at zero and small densities. The model results were found to be in agreement with perturbative QCD for the relevant astrophysical regime. Within the model, baryons and quarks are mediated by vector-isoscalar, vector- isovector, scalar-isoscalar, and scalar-isovector mesons (including strange quark- antiquark states). At low densities and/or temperatures, the nuclear liquid-gas first-order phase transition is reproduced. At high densities and/or temperatures, chiral symmetry is restored, which can be seen in a reduction of the effective baryon masses, and, if the quarks are included in the model, deconfinement takes place. Here, we present two different kinds of EoS. The first one is for cold chemically-equilibrated neutron stars. The second one is for matter out of equilibrium, such as the one created in particle collisions, supernova explosions and neutron star mergers, in which case we vary not only the density, but also the temperature and electric charge fraction. The versions of the EoS for cold chemically-equilibrated neutron stars are also available connected to crusts, which were chosen for having similar symmetry energy slopes. They are both zero temperature and beta equilibrium unified EoS’s by Gulminelli and Raduta [GR_2015] available in CompOSE. They considered the effective interactions Rs proposed by Friedrich and Reinhard [ FRPR_1986] (for EoS’s #1 and #2) and SkM proposed by L. Bennour et al. [BPRC_1989 ] (for EoS’s #2 to #8), both with cluster energy functionals from Danielewicz and Lee. The masses they use for neutrons and protons are 939.5653 MeV and 938.2720 MeV, respectively.

Nparam = 1
Particles = npeN
T min = 0.0
T max = 0.0
T pts = 1
nb min = 1.00e-07
nb max = 1.89e+00
nb pts = 1023
Y min = 0.0
Y max = 0.0
Y pts = 1

Nuclear Matter Properties

ns = 0.0 fm-3
E0 = 0.0 Mev
K = 0.0 Mev
K' = 0.0 Mev
J = 0.0 Mev
L = 0.0 Mev
Ksym = 0.0 MeV

Neutron Star Properties

Mmax = 0.0 Msun
MDU,e = 0.0 Msun
RMmax = 0.0 km
R1.4 = 0.0 km

References

References to the original work:
[BPRC_1989]   L. Bennour et al., Phys. Rev. C 40 2834 (1989)
[GR_2015]   F. Gulminelli and Ad. R. Raduta, Phys. Rev. C 92, 055803 (2015)
[DS_2008]   V. Dexheimer and S. Schramm, Astrophys. J. 683, 943 (2008)
[DEX_2017]   V. Dexheimer, Publications of the Astronomical Society of Australia 34 (2017)
[VS_2010]   V. Dexheimer and S. Schramm, Phys.Rev.C 81, 045201 (2010)
[VGTHS_2021]   V. Dexheimer, R.O. Gomes, T. Klähn, S. Han, M. Salinas, Phys.Rev.C 103, 2 (2021)

Data sheet

eos.pdf

Data

eos.zip (0.11 MB)
eos.zip_checksum.txt
Single files
eos.compo
eos.init
eos.mr
eos.nb
eos.t
eos.thermo
eos.yq
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