Neutron star deformability with hyperonization in density-dependent relativistic mean-field models
| Autor: | W. Z. Shangguan, Z. Q. Huang, Si-Na Wei, Wei-Zhou Jiang |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Nuclear Theory Gravitational wave Hyperon FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Star (graph theory) Symmetry (physics) Nuclear Theory (nucl-th) Nuclear physics Neutron star Mean field theory Astrophysics::Earth and Planetary Astrophysics Nucleon Nuclear Experiment Astrophysics - High Energy Astrophysical Phenomena Astrophysics::Galaxy Astrophysics Lepton |
| Popis: | Neutron star tidal deformability extracted from gravitational wave data provides a novel probe to the interior neutron star structures and the associated nuclear equation of state (EOS). Instead of the popular composition of nucleons and leptons in neutron stars, we include hyperons and examine the role of hyperons in the tidal deformability and its impact on the symmetry energy in a relativistic mean-field approach with the density-dependent parametrizations. The hyperons are found to have significant impact on the deformability, correlated sensitively with the onset density and fraction of hyperons in neutron star matter. Moderately lower onset density of hyperons can yield considerable modification to the tidal deformability and shift its inference on the nuclear EOS. The future measurements of the tidal deformability at multi-fiducial star masses are anticipated to lift the degeneracy between the contributions from the hyperon component and symmetry energy. to appear in Phys. Rev. D |
| Databáze: | OpenAIRE |
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