Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Chugunov, Andrey I."'
Observations of accreting neutron stars are widely used to constrain the microphysical properties of superdense matter. A key ingredient in this analysis is the heating associated with nuclear reactions in the outer layers of the neutron star (crust)
Externí odkaz:
http://arxiv.org/abs/2406.05680
Publikováno v:
Universe 9 (2023), 220
Neutron stars are the densest objects in the Universe. They have microscopically homogeneous core and heterogeneous crust. In particular, there may be a specific layer inside neutron stars, the mantle, which consists of substantially non-spherical nu
Externí odkaz:
http://arxiv.org/abs/2305.03603
We model the nuclear evolution of an accreted matter as it sinks toward the stellar center, in order to find its composition and equation of state. To this aim, we developed a simplified reaction network that allows for redistribution of free neutron
Externí odkaz:
http://arxiv.org/abs/2303.10003
Publikováno v:
Particles 5 (2022), 225-234 (Special Issue Selected Papers from "The Modern Physics of Compact Stars and Relativistic Gravity 2021")
Neutron stars are the densest objects in the Universe. In this paper we consider so-called inner crust - the layer, where neutron-excess nuclei are immersed into degenerate gas of electrons and sea of quasi-free neutrons. It was generally believed th
Externí odkaz:
http://arxiv.org/abs/2209.05851
Publikováno v:
MNRAS 518 (2023), 3813-3819
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 on neutra
Externí odkaz:
http://arxiv.org/abs/2209.05821
Autor:
Chugunov, Andrey I.
Publikováno v:
MNRAS 517 (2022), 4607-4611
The main contribution to the effective shear modulus of neutron star crust can be calculated within Coulomb solid model and can be approximated by simple analytical expression for arbitrary (even multicomponent) composition. Here I consider correctio
Externí odkaz:
http://arxiv.org/abs/2207.14649
Publikováno v:
MNRAS:Letters 515 (2022), L6-L10
Neutron stars in low-mass X-ray binaries are thought to be heated up by accretion-induced exothermic nuclear reactions in the crust. The energy release and the location of the heating sources are important ingredients of the thermal evolution models.
Externí odkaz:
http://arxiv.org/abs/2202.07486
Publikováno v:
Phys. Rev. D 104 (2021), L081301
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 $\Psi$, wh
Externí odkaz:
http://arxiv.org/abs/2109.06614
The deep crustal heating, associated with exothermal nuclear reactions, is believed to be a key parameter for describing the thermal evolution of accreting neutron stars. In this paper, we present the first thermodynamically consistent calculations o
Externí odkaz:
http://arxiv.org/abs/2105.01991
Publikováno v:
Phys. Rev. D 103, 101301 (2021)
Observed thermal emission from accreting neutron stars (NSs) in a quiescent state is believed to be powered by nonequilibrium nuclear reactions that heat the stellar crust (deep crustal heating paradigm). We derive a simple universal formula for the
Externí odkaz:
http://arxiv.org/abs/2011.09354