Properties of Rotating Neutron Star in Density-dependent Relativistic Mean-field Models

Abstract

Equilibrium sequences were developed for rotating NS in the relativistic mean-field interaction framework using four density-dependent equations of state for the NS matter. These sequences were constructed for the observed rotation frequencies of 25, 317, 346, 716, and 1122 Hz. The bounds of sequences were calculated in each model to determine the stability region. The gravitational mass, quadrupole moment, polar, forward and backward redshifts, and Kerr parameter were calculated. DDF and DD-ME$\delta$ were unable to properly describe the low-frequency neutron stars, PSR J0348+432, PSR J1614-2230 , and PSR J0740+6620 rotate at a frequency of 25, 317, and 346 Hz, respectively. All the selected EOSs properly described the rotation of PSR J1748-244ad, and PSR J1739-285 at a frequency of 716 and 1122 Hz, respectively. The mass of these stars was in the range of [0.68, 2.14]M${}_{\odot }$ and [1.67, 2.24]M${}_{\odot }$, respectively. The polar, forward and backward redshifts, and the quadrupole moment were calculated in all selected rotating frequencies and the Keplerian sequence. The results were consistent with observations. Confirming the mass of $1.5_{-1.0}^{+0.4}{M}_{\odot }$ for EXO 0748-676, our result will be close to the observed value, and the EOSs used in this study properly describe this star. The extremum of Kerr parameter, polar, forward and backward redshifts in all models reached constant values of, a/M$\approx$ 0.7, Z${}_p\approx$ 0.8, Z${}_{eq}^f\approx$ -0.3 and Z${}_{eq}^b\approx$ 2.2. These behaviors of redshifts and Kerr parameter are approximately independent of EOS. The observed behaviors must evaluate by other EOSs to find universal relations for these quantities. Also, a limit value was found for each of these parameters. In this case where these parameters are greater than the limit value, the star can rotate at a frequency equal to or greater than $\nu$= 1122 Hz.

arXiv comment15 pages, 10 figures, Accepted for publication in International Journal of Modern Physics D

References in corpus (45)

• 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
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• A Radio Pulsar Spinning at 716 Hz
• Thermonuclear (type-I) X-ray bursts observed by the Rossi X-ray Timing Explorer
• Reaction Dynamics with Exotic Beams
• Skyrme Interaction and Nuclear Matter Constraints
• Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods
• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Spin effects in the inspiral of coalescing compact binaries
• Maximum mass, moment of inertia and compactness of relativistic stars
• Nuclear Matter and its Role in Supernovae, Neutron Stars and Compact Object Binary Mergers
• GW170817: constraining the nuclear matter equation of state from the neutron star tidal deformability
• Discovery of absorption features in the X-ray spectrum of an isolated neutron star
• Quadrupole moments of rotating neutron stars
• Relativistic mean field interaction with density dependent meson-nucleon vertices based on microscopical calculations
• Nuclear Matter in Relativistic Mean Field Theory with Isovector Scalar Meson
• Relativistic model for nuclear matter and atomic nuclei with momentum-dependent self-energies
• Construction of Highly Accurate Models of Rotating Neutron Stars - Comparison of Three Different Numerical Schemes
• Revising the multipole moments of numerical spacetimes, and its consequences
• I-Q relation for rapidly rotating neutron stars
• Evidence for 1122 Hz X-Ray Burst Oscillations from the Neutron-Star X-Ray Transient XTE J1739-285
• Competition between delta isobars and hyperons and properties of compact stars
• GW190814's secondary component with mass $(2.50-2.67)$ M${}_{\odot }$ as a super-fast pulsar
• Fast Rotating Neutron Stars with Realistic Nuclear Matter Equation of State
• Highly accurate calculation of rotating neutron stars: Detailed description of the numerical methods
• Collective modes of asymmetric nuclear matter in Quantum HadroDynamics
• Implications from GW170817 for $\Delta$-isobar admixed hypernuclear compact stars
• Confronting GW190814 with hyperonization in dense matter and hypernuclear compact stars
• Quark matter nucleation in neutron stars and astrophysical implications
• Neutron star properties with relativistic equations of state
• On the stability and maximum mass of differentially rotating relativistic stars
• Relativistic hypernuclear compact stars with calibrated equations of state
• Discovery of a 552 Hz burst oscillation in the low-mass X-ray binary EXO 0748-676
• Instabilities in asymmetric nuclear matter
• Rotating neutron stars with exotic cores: masses, radii, stability
• Rapidly rotating $\Delta$-resonance-admixed hypernuclear compact stars
• Constraining compact star properties with nuclear saturation parameters
• On the last stable orbit around rapidly rotating neutron stars
• Universal relations for the Keplerian sequence of rotating neutron stars
• Dynamical instabilities of warm $np{e}^{-}$ matter: the $\delta$ meson effects
• Influence of scalar-isovector delta-meson field on quark phase structure in neutron stars
• Effect of the $\delta$-meson on the instabilities of nuclear matter under strong magnetic fields
• The cooling, mass and radius of the neutron star in EXO 0748-676 in quiescence with XMM-Newton

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