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We show that, in order to determine the equation of state of the inner crust of an accreting neutron star, one should minimize not the Gibbs free energy, as it is generally assumed in the literature, but a different thermodynamic potential…

高能天体物理现象 · 物理学 2023-10-02 Mikhail E. Gusakov , Elena M. Kantor , Andrey I. Chugunov

Transitions of nuclear compositions in the crust of a neutron star induced by stellar spin-down are evaluated at zero temperature. We construct a compressible liquid-drop model for the energy of nuclei immersed in a neutron gas, including…

天体物理学 · 物理学 2016-08-30 Kei Iida , Katsuhiko Sato

Cooling of neutron stars (NSs) with superfluid cores is simulated taking into account neutrino emission produced by Cooper pairing of nucleons. The critical temperatures of neutron and proton superfluidities, $T_{cn}$ and $T_{cp}$, are…

天体物理学 · 物理学 2007-05-23 K. P. Levenfish , Yu. A. Shibanov , D. G. Yakovlev

Near the surface of any neutron star there is a thin heat blanketing envelope that produces substantial thermal insulation of warm neutron star interiors and that relates the internal temperature of the star to its effective surface…

太阳与恒星天体物理 · 物理学 2021-06-15 M. V. Beznogov , A. Y. Potekhin , D. G. Yakovlev

This review demonstrates that neutrino emission from dense hadronic component in neutron stars is subject of strong modifications due to collective effects in the nuclear matter. With the most important in-medium processes incorporated in…

天体物理学 · 物理学 2009-09-25 D. N. Voskresensky

In order to study structure of the crust in neutron stars, we develop a finite-temperature Skyrme-Hartree-Fock method in the full three-dimensional coordinate space using the Fermion operator expansion method. It provides us with a possible…

核理论 · 物理学 2023-03-02 Takashi Nakatsukasa

The thermal nucleation of quark matter bubbles inside neutron stars is examined for various temperatures which the star may realistically encounter during its lifetime. It is found that for a bag constant less than a critical value, a very…

天体物理学 · 物理学 2009-12-30 Michael L. Olesen , Jes Madsen

It is generally considered that the neutron star cooling scenarios involving fast neutrino emission, from a kaon or pion condensate, quark matter, or the direct Urca process, require the presence of baryon pairing in the central core of the…

天体物理学 · 物理学 2009-10-28 Dany Page

Superbursts of neutron stars are rare but powerful events explained by the explosive burning of carbon in the deep layers of the outer envelope of the star. In this paper we perform a simulation of superbursts and propose a simple method…

高能天体物理现象 · 物理学 2024-03-01 A. D. Kaminker , A. Y. Potekhin , D. G. Yakovlev

The coefficients that determine the electron heat transfer and diffusion in the crust of neutron stars are calculated on the basis of a solution of the Boltzmann equation with allowance for degeneracy.

高能天体物理现象 · 物理学 2013-04-24 M. V. Glushikhina , G. S. Bisnovatyi-Kogan

We study the thermal evolution of axisymmetric rotating neutron stars in full general relativity. To this aim we develop "NSCool 2D Rot", a major upgrade of the 1D neutron stars thermal evolution code "NSCool" by D. Page. As a first…

高能天体物理现象 · 物理学 2023-01-18 Mikhail V. Beznogov , Jérôme Novak , Dany Page , Adriana R. Raduta

The deconfinement phase transition will lead to the release of latent heat during spins down of neutron stars if the transition is the first-order one.We have investigated the thermal evolution of neutron stars undergoing such deconfinement…

天体物理学 · 物理学 2008-11-26 Miao Kang , Nana Pan , Xiaodong Wang

Thermal states of neutron stars in soft X-ray transients (SXRTs) are thought to be determined by "deep crustal heating" in the accreted matter that drives the quiescent luminosity and cooling via emission of photons and neutrinos from the…

高能天体物理现象 · 物理学 2017-09-13 Sophia Han , Andrew W. Steiner

The thermal relaxation time of neutron stars, typically defined by a sudden drop in surface temperature, is usually on the order of 10 to 100 years. In this study, we investigate neutron star thermal relaxation by incorporating nucleon…

核理论 · 物理学 2025-06-24 Zhonghao Tu , Ang Li

The cooling of a compact star depends very sensitively on the state of dense matter at supranuclear densities, which essentially controls the neutrino emission, as well as on the structure of the stellar outer layers which control the…

天体物理学 · 物理学 2009-11-13 Dany Page , Ulrich Geppert , Fridolin Weber

The study of how neutron stars cool over time can provide invaluable insights into fundamental physics such as the nuclear equation of state and superconductivity and superfluidity. A critical relation in neutron star cooling is the one…

高能天体物理现象 · 物理学 2019-07-23 Wynn C. G. Ho , M. J. P. Wijngaarden , Philip Chang , Craig O. Heinke , Dany Page , Mikhail Beznogov , Daniel J. Patnaude

The neutron superfluidity in the inner crust of a neutron star has been traditionally studied considering either homogeneous neutron matter or only a small number of nucleons confined inside the spherical Wigner-Seitz cell. Drawing…

核理论 · 物理学 2010-04-22 N. Chamel , S. Goriely , J. M. Pearson , M. Onsi

Spontaneous wavefunction collapse models, like the Continuous Spontaneous Localization, are designed to suppress macroscopic superpositions, while preserving microscopic quantum phenomena. An observable consequence of collapse models is…

量子物理 · 物理学 2019-08-27 Antoine Tilloy , Thomas M. Stace

We model neutron star cooling with several microscopic nuclear equations of state based on different nucleon-nucleon interactions and three-body forces, and compatible with the recent GW170817 neutron star merger event. They all feature…

高能天体物理现象 · 物理学 2020-01-16 J. -B. Wei , G. F. Burgio , H. -J. Schulze

The diffusive thermal conductivity of neutrons in dense matter [$\rho \sim (1 - 8) \times 10^{14}$ g cm$^{-3}$] of neutron star cores is calculated. The contribution from neutron--neutron and neutron--proton collisions is taken into…

天体物理学 · 物理学 2009-11-06 D. A. Baiko , P. Haensel , D. G. Yakovlev