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The European Physical Journal A
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Finite-temperature equations of state of compact stars with hyperons: three-dimensional tables

Authors: Stefanos Tsiopelas; Armen Sedrakian; Micaela Oertel;

Finite-temperature equations of state of compact stars with hyperons: three-dimensional tables

Abstract

AbstractWe construct tables of finite temperature equation of state (EoS) of hypernuclear matter in the range of densities, temperatures, and electron fractions that are needed for numerical simulations of supernovas, proto-neutron stars, and binary neutron star mergers and cast them in the format of CompOSE database. The tables are extracted from a model that is based on covariant density functional (CDF) theory that includes the full $$J^P=1/2^+$$ J P = 1 / 2 + baryon octet in a manner that is consistent with the current astrophysical and nuclear constraints. We employ a parameterization with three different values of the slope of the symmetry energy $$L_\textrm{sym}=30$$ L sym = 30 , 50 and 70 MeV and fixed skewness $$Q_\textrm{sat}= 400$$ Q sat = 400 MeV for above saturation matter. A model for the EoS of inhomogeneous matter is matched at sub-saturation density to the high-density hypernuclear EoS. We discuss the generic features of the resulting EoS and the composition of matter as a function of density, temperature, and electron fraction. The nuclear characteristics and strangeness fraction of these models are compared to the alternatives from the literature. The integral properties of static and rapidly rotating compact stars in the limit of zero temperature are discussed and confronted with the multimessenger astrophysical constraints.

Keywords

[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th], star: compact, neutron star: binary, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], dimension: 3, energy: symmetry, Nuclear Theory, hypernucleus, FOS: Physical sciences, equation of state: finite temperature, 530, Nuclear Theory (nucl-th), strangeness, supernova, numerical calculations, Solar and Stellar Astrophysics (astro-ph.SR), High Energy Astrophysical Phenomena (astro-ph.HE), saturation, ddc:530, parametrization, Astrophysics - Solar and Stellar Astrophysics, covariance, multimessenger, baryon: octet, data management, Astrophysics - High Energy Astrophysical Phenomena

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Top 10%
Average
Top 10%
Green
hybrid