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In the standard picture of the crust of a neutron star, matter there is simple: a body-centered-cubic (bcc) lattice of nuclei immersed in an essentially uniform electron gas. We show that at densities above that for neutron drip…

核理论 · 物理学 2015-06-17 D. Kobyakov , C. J. Pethick

I investigate the shape of the electron cosmic ray spectrum in the range up to ~1000 keV, assuming that the acceleration process at the shock results in a power law in momentum, and that downstream of the shock the spectrum is affected by…

天体物理学 · 物理学 2008-06-30 Jacco Vink

The composition of the inner crust of neutron stars is usually studied using phenomenological interactions such as Skyrme energy-density functionals. But most of these functionals do not agree well with ab-initio calculations of very dilute…

核理论 · 物理学 2024-04-10 Sunny Kumar Gupta , Michael Urban

The elasticity of neutron star crust is important for adequate interpretation of observations. To describe elastic properties one should rely on theoretical models. The most widely used is Coulomb crystal model (system of point-like charges…

高能天体物理现象 · 物理学 2023-10-02 Nikita A. Zemlyakov , Andrey I. Chugunov

The process of a non-equilibrium chemical composition formation in the crust of a new born neutron star is considered, during cooling due to neutrino energy losses. A model is constructed for explaining accumulation of a large quantity of…

高能天体物理现象 · 物理学 2022-03-31 A. Yu. Ignatovskiy , G. S. Bisnovatyi-Kogan

The core of a neutron star contains several species of particles, whose relative equilibrium concentrations are determined by the local density. As the star spins down, its centrifugal force decreases continuously, and the star contracts.…

天体物理学 · 物理学 2009-10-22 Andreas Reisenegger

Stability of nuclei beyond the drip lines in the presence of an enveloping gas of nucleons and electrons, as prevailing in the inner crust of a neutron star, is studied in the temperature-dependent Thomas-Fermi framework. A limiting…

核理论 · 物理学 2009-11-07 Tapas Sil , J. N. De , S. K. Samaddar , X. Vinas , M. Centelles , B. K. Agrawal , S. K. Patra

Coherent bremsstrahlung of high energy electrons moving in a three-dimensional imperfect periodic lattice consisting of a complicated system of atoms is considered. On the basis of the normalized probability density function of the…

材料科学 · 物理学 2016-08-31 S. Bellucci , V. A. Maisheev

We discuss the ground state properties of matter in outer and inner crusts of neutron stars under the influence of strong magnetic fields. In particular, we demonstrate the effects of Landau quantization of electrons on compositions of…

高能天体物理现象 · 物理学 2015-06-12 Rana Nandi , Debades Bandyopadhyay

The crust of a neutron star (NS) provides a unique laboratory for studying matter under extreme density and magnetic field conditions that cannot be realized in terrestrial experiments. However, direct observational constraints on its…

高能天体物理现象 · 物理学 2026-05-22 Sheng-Lun Xie , Yun-Wei Yu , Shao-Lin Xiong , Wang-Chen Xue

The study of neutron stars is a topic of central interest in the investigation of the properties of strongly compressed hadronic matter. Whereas in heavy-ion collisions the fireball, created in the collision zone, contains very hot matter,…

太阳与恒星天体物理 · 物理学 2015-06-04 S. Schramm , V. Dexheimer , R. Negreiros , T. Schürhoff , J. Steinheimer

Elastic scattering on nucleons, \nu N -> N \nu, is the dominant supernova (SN) opacity source for \mu and \tau neutrinos. The dominant energy- and number-changing processes were thought to be \nu e^- -> e^- \nu and \nu\bar \nu <-> e^+ e^-…

天体物理学 · 物理学 2009-10-30 Steen Hannestad , Georg Raffelt

A fully self-consistent model of the neutron star inner crust based upon models of the nucleonic equation of state at zero temperature is constructed. The results nearly match those of previous calculations of the inner crust given the same…

核理论 · 物理学 2008-11-26 Andrew W. Steiner

Neutrino and axion production in neutron stars occurs mainly as bremsstrahlung from nucleon-nucleon (NN) scattering. The energy radiated via neutrinos or axions is typically very small compared to other scales in the two-nucleon system. The…

天体物理学 · 物理学 2009-10-31 Christoph Hanhart , Daniel R. Phillips , Sanjay Reddy

The nebular phase of lanthanide-rich ejecta of a neutron star merger (NSM) is studied by using a one-zone model, in which the atomic properties are represented by a single species, neodymium (Nd). Under the assumption that beta-decay of…

高能天体物理现象 · 物理学 2021-07-21 Kenta Hotokezaka , Masaomi Tanaka , Daiji Kato , Gediminas Gaigalas

General relativistic multi-group and multi-flavor Boltzmann neutrino transport in spherical symmetry adds a new level of detail to the numerical bridge between microscopic nuclear and weak interaction physics and the macroscopic evolution…

Calculations are performed of the cooling of neutron stars with standard and enhanced neutrino energy losses in the presence of neutron and proton superfluidities in the stellar cores. The effects of superfluidity on the heat capacity and…

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

Based on an extended nuclear statistical equilibrium model, we investigate the properties of non-accreted crusts of young and warm neo-neutron stars, i.e., of finite-temperature inhomogeneous dense matter in beta equilibrium. An interesting…

核理论 · 物理学 2025-11-10 Mikhail V. Beznogov , Adriana R. Raduta

Geometrical structure of matter at subnuclear densities is investigated in the presence of a degenerate gas of neutrinos as encountered in stellar collapse. The crystalline phases with spherical, cylindrical and planar nuclei as well as…

天体物理学 · 物理学 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

The influence of the admixture of the $^{3}F_{2}$ state onto collective spin oscillations and neutrino emission processes in the triplet superfluid neutron liquid is studied in the BCS approximation. The eigen mode of spin oscillations with…

核理论 · 物理学 2011-10-11 L. B. Leinson