Neutron star crustal properties from relativistic mean-field models and bulk parameters effects

Abstract

We calculate crustal properties of neutron stars, namely, mass ($M_{\mathrm{crust}}$), radius ($R_{\mathrm{crust}}$) and fraction of moment of inertia ($\Delta I/I$) from parametrizations of hadronic relativistic mean-field (RMF) model consistent with symmetric and asymmetric nuclear matter constraints, as well as some stellar boundaries. We verify which one are also in agreement with restrictions of $\Delta I/I⩾1.4\%$ and $\Delta I/I⩾7\%$ related to the glitching mechanism observed in pulsars, such as the Vela one. The latter constraint explains the glitches phenomenon when entrainment effects are taken into account. Our findings indicate that these parametrizations pass in the glitching limit for a neutron star mass range of $M⩽1.82M_{\odot }$ ($\Delta I/I⩾1.4\%$), and $M⩽1.16M_{\odot }$ ($\Delta I/I⩾7\%$). We also investigate the influence of nuclear matter bulk parameters on crustal properties and find that symmetry energy is the quantity that produces the higher variations on $M_{\mathrm{crust}}$, $R_{\mathrm{crust}}$, and~$\Delta I/I$. Based on the results, we construct a particular RMF parametrization able to satisfy $\Delta I/I⩾7\%$ even at $M=1.4M_{\odot }$, the mass value used to fit data from the softer component of the Vela pulsar X-ray spectrum. The model also presents compatibility with observational data from PSR J1614-2230, PSR J0348+0432, and MSP J0740+6620 pulsars, as well as, with data from the Neutron Star Interior Composition Explorer (NICER) mission.

11 pages, 8 figures, published in European Physical Journal A Topical Issue 'CompOSE: a repository for Neutron Star Equations of State and Transport Properties'

References in corpus (19)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Relativistic effective interaction for nuclei, giant resonances, and neutron stars
• Crustal Entrainment and Pulsar Glitches
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. I. The Millisecond Pulsar X-ray Data Set
• Pulsar Glitches: The Crust may be Enough
• Non-rotating and rotating neutron stars in the extended field theoretical model
• Asymmetric nuclear matter and neutron-skin in extended relativistic mean field model
• Isovector properties of the Gogny interaction
• Higher-order symmetry energy and neutron star core-crust transition with Gogny forces
• Impact of the neutron star crust on the tidal polarizability
• Effects of $\omega$ meson self-coupling on the properties of finite nuclei and neutron stars
• Low Densities Instability of Relativistic Mean Field Models
• Correlations between critical parameters and bulk properties of nuclear matter
• Study of spin polarized nuclear matter and finite nuclei with finite range simple effective interaction

Cited by in corpus (2)

• Crustal properties of a neutron star within an effective relativistic mean-field model
• Imprints of high-density nuclear symmetry energy on the crustal fraction of neutron star moment of inertia