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| Main Authors: | , |
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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2411.06238 |
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| _version_ | 1866910819743170560 |
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| author | Zhang, Nai-Bo Li, Bao-An |
| author_facet | Zhang, Nai-Bo Li, Bao-An |
| contents | The density dependence of nuclear symmetry energy $E_{\rm sym}(ρ)$ remains the most uncertain aspect of the equation of state (EOS) of supradense neutron-rich nucleonic matter. Implications of observational crustal fraction of neutron star (NS) moment of inertia $ΔI/I$ on the $E_{\rm sym}(ρ)$ are examined in the present work, utilizing an isospin-dependent parameterization of NS EOS. We find that symmetry energy parameters significantly influence the $ΔI/I$, while the EOS of symmetric nuclear matter has a negligible effect. An increase in the slope $L$ and skewness $J_{\rm sym}$ of symmetry energy results in a larger $ΔI/I$, whereas an increase in the curvature $K_{\rm sym}$ leads to a reduction in $ΔI/I$. Additionally, we discuss the imprints of observational $ΔI/I$ on the symmetry energy for NSs with masses of 1.0 M$_\odot$ or 1.4 M$_\odot$. Our results indicate that the $ΔI/I$ has the potential to set a lower limit of symmetry energy at densities exceeding $3ρ_0$, particularly when $L$ is constrained to values less than $60$ MeV, thereby enhancing our understanding of supradense NS matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_06238 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Imprints of high-density nuclear symmetry energy on the crustal fraction of neutron star moment of inertia Zhang, Nai-Bo Li, Bao-An Nuclear Theory The density dependence of nuclear symmetry energy $E_{\rm sym}(ρ)$ remains the most uncertain aspect of the equation of state (EOS) of supradense neutron-rich nucleonic matter. Implications of observational crustal fraction of neutron star (NS) moment of inertia $ΔI/I$ on the $E_{\rm sym}(ρ)$ are examined in the present work, utilizing an isospin-dependent parameterization of NS EOS. We find that symmetry energy parameters significantly influence the $ΔI/I$, while the EOS of symmetric nuclear matter has a negligible effect. An increase in the slope $L$ and skewness $J_{\rm sym}$ of symmetry energy results in a larger $ΔI/I$, whereas an increase in the curvature $K_{\rm sym}$ leads to a reduction in $ΔI/I$. Additionally, we discuss the imprints of observational $ΔI/I$ on the symmetry energy for NSs with masses of 1.0 M$_\odot$ or 1.4 M$_\odot$. Our results indicate that the $ΔI/I$ has the potential to set a lower limit of symmetry energy at densities exceeding $3ρ_0$, particularly when $L$ is constrained to values less than $60$ MeV, thereby enhancing our understanding of supradense NS matter. |
| title | Imprints of high-density nuclear symmetry energy on the crustal fraction of neutron star moment of inertia |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2411.06238 |