Constraining properties of rapidly rotating neutron stars using data from heavy-ion collisions

Abstract

Properties, structure, and thermal evolution of neutron stars are determined by the equation of state of stellar matter. Recent data on isospin-diffusion and isoscaling in heavy-ion collisions at intermediate energies as well as the size of neutron skin in ${}^{208}Pb$ have constrained considerably the density dependence of the nuclear symmetry energy and, in turn, the equation of state of neutron-rich nucleonic matter. These constraints could provide useful information about the global properties of rapidly rotating neutron stars. Models of rapidly rotating neutron stars are constructed applying several nucleonic equations of state. Particular emphasis is placed on configurations rotating rigidly at $716$ and $1122Hz$. The range of allowed hydrostatic equilibrium solutions is determined and tested for stability. The effect of rotation on the internal composition and thermal properties of neutron stars is also examined. At a given rotational frequency, each equation of state yields a range of possible neutron stars configurations restricted by the Keplerian (mass-shedding) limit, corresponding to the maximal circumferential radius, and the limit due to the onset of instabilities with respect to axial-symmetric perturbations, corresponding to the minimal equatorial radius of a stable neutron star model. We show that the mass of a neutron star rotating uniformly at $1122Hz$ is between $1.7$ and $2.1M_{\sun}$. Central stellar density and proton fraction decrease with increasing rotational frequency with respect to static models, and depending on the exact stellar mass and angular velocity, can drop below the Direct Urca threshold thus closing the fast cooling channel.

21 pages, 9 figures and 3 tables. Accepted for publication in the Astrophysical Journal

References in corpus (43)

• The equation of state for nucleon matter and neutron star structure
• Determination of the Equation of State of Dense Matter
• The Physics of Neutron Stars
• Isospin Asymmetry in Nuclei and Neutron Stars
• A Radio Pulsar Spinning at 716 Hz
• Neutron Star Structure and the Neutron Radius of 208Pb
• Neutron Star Cooling
• Reaction Dynamics with Exotic Beams
• Neutron-Rich Nuclei in Heaven and Earth
• Rotating Stars in Relativity
• Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods
• Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
• Determination of the stiffness of the nuclear symmetry energy from isospin diffusion
• The Cooling of Compact Stars
• Phases of dense matter in neutron stars
• EXO 0748-676 Rules out Soft Equations of State for Neutron Star Matter
• Hyperon stars in the Brueckner-Bethe-Goldstone theory
• Isotopic Scaling in Nuclear Reactions
• Nuclear Matter and its Role in Supernovae, Neutron Stars and Compact Object Binary Mergers
• Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies
• Probing the High Density Behaviour of Nuclear Symmetry Energy with High Energy Heavy-Ion Collisions
• Momentum dependence of symmetry potential in asymmetric nuclear matter for transport model calculations
• Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
• Neutron-Proton Differential Flow as a Probe of Isospin-Dependence of Nuclear Equation of State
• Numerical approach for high precision 3-D relativistic star models
• Recent Progress in Neutron Star Theory
• Constraining URCA cooling of neutron stars from the neutron radius of 208Pb
• Nonaxisymmetric Neutral Modes in Rotating Relativistic Stars
• Constraining the Radii of Neutron Stars with Terrestrial Nuclear Laboratory Data
• Evidence for 1122 Hz X-Ray Burst Oscillations from the Neutron-Star X-Ray Transient XTE J1739-285
• Microscopic calculations in asymmetric nuclear matter
• Density Dependence of the Symmetry energy and the Equation of State of Isospin Asymmetric Nuclear Matter
• Nuclear Isospin Diffusivity
• Isospin Diffusion in Heavy-Ion Collisions and the Neutron Skin Thickness of Lead
• Highly accurate calculation of rotating neutron stars
• Neutron star properties and the equation of state of neutron-rich matter
• Neutrino Propagation in Dense Astrophysical Systems
• Constraining a possible time-variation of the gravitational constant through "gravitochemical heating" of neutron stars
• Probing the Nuclear Symmetry Energy with Heavy-Ion Reactions Induced by Neutron-Rich Nuclei
• Constraining a possible time variation of the gravitational constant G with terrestrial nuclear laboratory data
• Rotation at 1122 Hz and the neutron star structure
• Rapidly rotating strange stars for a new equation of state of strange quark matter
• Rotating Skyrmion Stars

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• Crustal properties of a neutron star within an effective relativistic mean-field model
• BigApple force and its implications to finite nuclei and astrophysical objects
• Imprints of Nuclear Symmetry Energy on Properties of Neutron Stars
• Energy release from hadron-quark phase transition in neutron stars and the axial $w$-mode of gravitational waves
• The attribute of rotational profile to the hyperon puzzle in the prediction of heaviest compact star
• Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
• Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
• Properties of rotating neutron stars in light of binary compact object mergers