A Modern View of the Equation of State in Nuclear and Neutron Star Matter

被引：19

作者：

Burgio, G. Fiorella ^{[1
]}

Schulze, Hans-Josef ^{[1
]}

Vidana, Isaac ^{[1
]}

Wei, Jin-Biao ^{[1
]}

机构：

[1] Univ Catania, INFN, Dipartimento Fis & Astron, Sez Catania, Via Santa Sofia 64, I-95123 Catania, Italy

来源：

SYMMETRY-BASEL | 2021年 / 13卷 / 03期

关键词：

nuclear matter; neutron star; equation of state; gravitational waves; binary mergers; SELF-CONSISTENT CALCULATIONS; MONTE-CARLO CALCULATIONS; GROUND-STATE; DENSITY-DEPENDENCE; 3-NUCLEON FORCES; SYMMETRY ENERGY; K+ PRODUCTION; MAXIMUM MASS; RADII; CONSTRAINTS;

D O I：

10.3390/sym13030400

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Background: We analyze several constraints on the nuclear equation of state (EOS) currently available from neutron star (NS) observations and laboratory experiments and study the existence of possible correlations among properties of nuclear matter at saturation density with NS observables. Methods: We use a set of different models that include several phenomenological EOSs based on Skyrme and relativistic mean field models as well as microscopic calculations based on different many-body approaches, i.e., the (Dirac-)Brueckner-Hartree-Fock theories, Quantum Monte Carlo techniques, and the variational method. Results: We find that almost all the models considered are compatible with the laboratory constraints of the nuclear matter properties as well as with the largest NS mass observed up to now, 2.14(+0.10)(-0.09) M-circle dot for the object PSR J0740+6620, and with the upper limit of the maximum mass of about 2.3-2.5 M-circle dot deduced from the analysis of the GW170817 NS merger event. Conclusion: Our study shows that whereas no correlation exists between the tidal deformability and the value of the nuclear symmetry energy at saturation for any value of the NS mass, very weak correlations seem to exist with the derivative of the nuclear symmetry energy and with the nuclear incompressibility.

引用

页码：1 / 16

页数：16

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