N. Chamel
YOU?
Author Swipe
View article: Stellar properties indicating the presence of hyperons in neutron stars
Stellar properties indicating the presence of hyperons in neutron stars Open
We describe distinctive stellar features indicating the presence of hyperons in neutron stars. A strongly negative curvature of the mass-radius relation R(M) is characteristic of hyperons, which can be determined from measurements of neutr…
View article: Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches
Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches Open
We investigate the effects of temperature on the properties of the inner crust of a non-accreting neutron star. To this aim, we employ two different treatments: the compressible liquid drop model (CLDM) and the temperature-dependent extend…
View article: Superfluid fraction in the crystalline crust of a neutron star: Role of quantum zero-point motion of ions
Superfluid fraction in the crystalline crust of a neutron star: Role of quantum zero-point motion of ions Open
The suppression of the neutron superfluid fraction in the inner crust of a cold neutron star is mitigated by the quantum zero-point motion of ions about their equilibrium position. In turn, the crustal dynamics is altered by the presence o…
View article: Roadmap for warm dense matter physics
Roadmap for warm dense matter physics Open
This roadmap presents the state-of-the-art, current challenges and near future developments anticipated in the thriving field of warm dense matter physics. Originating from strongly coupled plasma physics, high pressure physics and high en…
View article: Evidence of Gapless Superfluidity in MXB 1659-29 With and Without Late Time Cooling
Evidence of Gapless Superfluidity in MXB 1659-29 With and Without Late Time Cooling Open
The interpretation of the thermal relaxation of some transiently accreting neutron stars in quasipersistent soft X-ray transients, especially MXB 1659-29, has been found to be challenging within the traditional deep crustal heating paradig…
View article: Superfluid fraction in the crystalline crust of a neutron star: Role of BCS pairing
Superfluid fraction in the crystalline crust of a neutron star: Role of BCS pairing Open
The breaking of translational symmetry in the inner crust of a neutron star leads to the depletion of the neutron superfluid reservoir similarly to cold atomic condensates in optical lattices and in supersolids. This effect is studied in t…
View article: Pressure and chemical potentials in the inner crust of a cold neutron star within Hartree-Fock and extended Thomas-Fermi methods
Pressure and chemical potentials in the inner crust of a cold neutron star within Hartree-Fock and extended Thomas-Fermi methods Open
Self-consistent mean-field methods with Skyrme-type effective interactions and semiclassical approximations, such as the Thomas-Fermi approach and its extensions are particularly well-suited for describing in a thermodynamically consistent…
View article: Pressure and chemical potentials in the inner crust of a cold neutron star within Hartree-Fock and extended Thomas-Fermi methods
Pressure and chemical potentials in the inner crust of a cold neutron star within Hartree-Fock and extended Thomas-Fermi methods Open
Self-consistent mean-field methods with Skyrme-type effective interactions and semiclassical approximations, such as the Thomas-Fermi approach and its extensions are particularly well-suited for describing in a thermodynamically consistent…
View article: Superfluid fraction in the crystalline crust of a neutron star: role of BCS pairing
Superfluid fraction in the crystalline crust of a neutron star: role of BCS pairing Open
The breaking of translational symmetry in the inner crust of a neutron star leads to the depletion of the neutron superfluid reservoir similarly to cold atomic condensates in optical lattices and in supersolids. This effect is studied in t…
View article: Time-Dependent Nuclear Energy-Density Functional Theory Toolkit for Neutron Star Crust: Dynamics of a Nucleus in a Neutron Superfluid
Time-Dependent Nuclear Energy-Density Functional Theory Toolkit for Neutron Star Crust: Dynamics of a Nucleus in a Neutron Superfluid Open
We present a new numerical tool designed to probe the dense layers of neutron star crusts. It is based on the time-dependent Hartree-Fock-Bogoliubov theory with generalized Skyrme nuclear energy-density functionals of the Brussels-Montreal…
View article: Skyrme-Hartree-Fock-Bogoliubov mass models on a 3D mesh: IV. Improved description of the isospin dependence of pairing
Skyrme-Hartree-Fock-Bogoliubov mass models on a 3D mesh: IV. Improved description of the isospin dependence of pairing Open
Providing reliable data on the properties of atomic nuclei and infinite nuclear matter to astrophysical applications remains extremely challenging, especially when treating both properties coherently within the same framework. Methods base…
View article: On variational trial functions in extended Thomas—Fermi method
On variational trial functions in extended Thomas—Fermi method Open
Parametrized nucleon density distributions are widely employed for the\ncalculation of the properties of atomic nuclei and dense inhomogeneous matter\nin compact stars within the Thomas-Fermi method and its extensions. We show\nthat the us…
View article: Role of neutron pairing with density-gradient dependence in the semimicroscopic treatment of the inner crust of neutron stars
Role of neutron pairing with density-gradient dependence in the semimicroscopic treatment of the inner crust of neutron stars Open
Using the fourth-order extended Thomas-Fermi method with Strutinsky-integral shell and pairing corrections, we calculate the inner crust of neutron stars with the BSk31 functional, whose pairing has two terms: (i) a term that is fitted to …
View article: Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion
Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion Open
Torsional oscillations of magnetized neutron stars have been well studied since they may be relevant to the physical interpretation of some of the observed quasiperiodic oscillations in the magnetar giant flares. In the crustal region of a…
View article: Role of neutron pairing with density-gradient dependence in the semi-microscopic treatment of the inner crust of neutron stars
Role of neutron pairing with density-gradient dependence in the semi-microscopic treatment of the inner crust of neutron stars Open
Using the fourth-order extended Thomas-Fermi method with Strutinsky-integral shell and pairing corrections, we calculate the inner crust of neutron stars with the BSk31 functional, whose pairing has two terms: i) a term that is fitted to t…
View article: Unified equations of state for cold nonaccreting neutron stars with Brussels-Montreal functionals. V. Improved parametrization of the nucleon density distributions
Unified equations of state for cold nonaccreting neutron stars with Brussels-Montreal functionals. V. Improved parametrization of the nucleon density distributions Open
We previously studied the inner crust and the pasta mantle of a neutron star\nwithin the 4th-order extended Thomas-Fermi (ETF) approach with consistent\nproton shell corrections added perturbatively via the Strutinsky integral (SI)\ntheore…
View article: Gapless Neutron Superfluidity Can Explain the Late Time Cooling of Transiently Accreting Neutron Stars
Gapless Neutron Superfluidity Can Explain the Late Time Cooling of Transiently Accreting Neutron Stars Open
The current interpretation of the observed late time cooling of transiently accreting neutron stars in low-mass x-ray binaries during quiescence requires the suppression of neutron superfluidity in their crust at variance with recent ab in…
View article: Time-dependent nuclear energy-density functional theory toolkit for neutron star crust: Dynamics of a nucleus in a neutron superfluid
Time-dependent nuclear energy-density functional theory toolkit for neutron star crust: Dynamics of a nucleus in a neutron superfluid Open
We present a new numerical tool designed to probe the dense layers of neutron star crusts. It is based on the time-dependent Hartree-Fock-Bogoliubov theory with generalized Skyrme nuclear energy-density functionals of the Brussels-Montreal…
View article: Gapless neutron superfluidity can explain the late time cooling of transiently accreting neutron stars
Gapless neutron superfluidity can explain the late time cooling of transiently accreting neutron stars Open
The current interpretation of the observed late time cooling of transiently accreting neutron stars in low-mass X-ray binaries during quiescence requires the suppression of neutron superfluidity in their crust at variance with recent ab in…
View article: Superfluidity and Superconductivity in Neutron Stars
Superfluidity and Superconductivity in Neutron Stars Open
By compressing matter to densities up to several times the density of atomic nuclei, the catastrophic gravitational collapse of the core of stars with a mass M≳8M⊙ during supernova explosions and the neutron star left behind (see, e [...]
View article: Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion
Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion Open
Torsional oscillations of magnetized neutron stars have been well studied since they may be relevant to the physical interpretation of some of the observed quasiperiodic oscillations in the magnetar giant flares. In the crustal region of a…
View article: Gapless superfluidity in neutron stars: Normal-fluid fraction
Gapless superfluidity in neutron stars: Normal-fluid fraction Open
Our previous investigation within the time-dependent nuclear energy-density functional theory showed that the nuclear superfluids contained inside cold neutron stars could become gapless under certain circumstances. The absence of a gap in…
View article: Progress on Brussels-Skyrme atomic mass models on a grid: stiff neutron matter equation of state
Progress on Brussels-Skyrme atomic mass models on a grid: stiff neutron matter equation of state Open
We report here the current developments on the Brussels-Skyrme-on-a-Grid (BSkG) atomic mass models. In comparison with our previous models, BSkG3 improves the infinite nuclear matter (INM) properties which opens its applications to neutron…
View article: Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs
Role of Quark Matter and Color Superconductivity in the Structure and Tidal Deformability of Strange Dwarfs Open
In 1995, Glendenning, Kettner and Weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than th…
View article: Unified equations of state for cold nonaccreting neutron stars with Brussels-Montreal functionals. IV. Role of the symmetry energy in pasta phases
Unified equations of state for cold nonaccreting neutron stars with Brussels-Montreal functionals. IV. Role of the symmetry energy in pasta phases Open
Our previous investigation of neutron-star crusts, based on the functional BSk24, led to a substantial reduction of the pasta mantle when Strutinsky integral and pairing corrections were added on top of the fourth-order extended Thomas-Fer…