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The impact of nuclear physics theories on cooling of isolated neutron stars is analyzed. Physical properties of neutron star matter important for cooling are reviewed such as composition, the equation of state, superfluidity of various…

天体物理学 · 物理学 2009-11-10 D. G. Yakovlev , O. Y. Gnedin , M. E. Gusakov , A. D. Kaminker , K. P. Levenfish , A. Y. Potekhin

We present a first exploration of the results of neutron star-black hole mergers using black hole masses in the most likely range of $7M_\odot-10M_\odot$, a neutrino leakage scheme, and a modeling of the neutron star material through a…

The unknown state of matter at ultra-high density, large proton/neutron number asymmetry, and low temperature is a major long-standing problem in modern physics. Neutron stars provide the only known setting in the Universe where matter in…

We perform a systematic analysis of neutron star radius constraints from five quiescent low-mass X-ray binaries and examine how they depend on measurements of their distances and amounts of intervening absorbing material, as well as their…

高能天体物理现象 · 物理学 2014-03-20 James M. Lattimer , Andrew W. Steiner

Binary neutron star mergers observations are a unique way to constrain fundamental physics and astrophysics at the extreme. The interpretation of gravitational-wave events and their electromagnetic counterparts crucially relies on…

高能天体物理现象 · 物理学 2020-11-18 Sebastiano Bernuzzi

The standard variational derivation of stellar matter structure in the Wigner-Seitz approximation is generalized to the finite temperature situation where a wide distribution of different nuclear species can coexist in the same density and…

核理论 · 物理学 2017-02-14 F. Gulminelli , Ad. R. Raduta

An analysis of discrete systems is important for understanding of various physical processes, such as excitations in crystal lattices and molecular chains, the light propagation in waveguide arrays, and the dynamics of Bose-condensate…

斑图形成与孤子 · 物理学 2019-08-06 E. N. Tsoy , B. A. Umarov

Basic assumptions of the NLTE approximation in stellar atmospheres are summarized. The assumptions of thermodynamic equilibrium, local thermodynamic equilibrium (LTE), and non-LTE (NLTE) are compared. It is emphasized that LTE is a poor…

太阳与恒星天体物理 · 物理学 2016-07-27 Jiří Kubát

Thermal evolution of neutron stars is known to depend on the properties of superdense matter in neutron star cores. We suggest a statistical analysis of isolated cooling middle-aged neutron stars and old transiently accreting…

太阳与恒星天体物理 · 物理学 2015-07-16 M. V. Beznogov , D. G. Yakovlev

Recent ROSAT measurements show that the x-ray emission from isolated neutron stars is modulated at the stellar rotation period. To interpret these measurements, one needs precise calculations of the heat transfer through the thin insulating…

天体物理学 · 物理学 2009-10-30 Jeremy S. Heyl , Lars Hernquist

We develop a general formalism to treat, in general relativity, the nonradial oscillations of a superfluid neutron star about static (non-rotating) configurations. The matter content of these stars can, as a first approximation, be…

广义相对论与量子宇宙学 · 物理学 2009-11-07 N. Andersson , G. L. Comer , D. Langlois

We perform a Bayesian analysis of the neutron star (NS) equation of state (EoS) based on a wide set of Skyrme functionals, derived from previous nuclear physics inferences. The novelty of this approach lies in starting from the full…

核理论 · 物理学 2026-04-15 Pietro Klausner , Marco Antonelli , Francesca Gulminelli

We study quasinormal $f-$mode oscillations in neutron star(NS) interiors within the linearized General Relativistic formalism. We utilize approximately 9000 nuclear Equations of State (EOS) using spectral representation techniques,…

高能天体物理现象 · 物理学 2024-04-30 Debanjan Guha Roy , Tuhin Malik , Swastik Bhattacharya , Sarmistha Banik

We construct a set of unified equations of state based on the quark mean field (QMF) model, calibrated to different values of nuclear symmetry energy slope at the saturation density ($L_0$), with the aim of exploring both the static…

核理论 · 物理学 2025-07-29 Zhonghao Tu , Xiangdong Sun , Shuochong Han , Zhiqiang Miao , Ang Li

Neutron Stars (NSs) are compact stellar objects that are stable solutions in General Relativity. Their internal structure is usually described using an equation of state that involves the presence of ordinary matter and its interactions.…

高能天体物理现象 · 物理学 2020-12-18 M. Ángeles Pérez-García , J. Silk

This review paper outlines background information and covers recent advances made via the analysis of spectra and images of prominence plasma and the increased sophistication of non-LTE (ie when there is a departure from Local Thermodynamic…

太阳与恒星天体物理 · 物理学 2011-05-10 N. Labrosse , P. Heinzel , J. -C. Vial , T. Kucera , S. Parenti , S. Gunar , B. Schmieder , G. Kilper

We examine the protoneutron star (PNS) stability in this study by solving the radial oscillation equations. For this purpose, we adopt the numerical results of massive PNS toward the black hole formation obtained by spherically symmetric…

高能天体物理现象 · 物理学 2021-08-18 Hajime Sotani , Kohsuke Sumiyoshi

We derive analytic approximations for the neutrino luminosities and the heat capacities of neutron stars with isothernal nucleon cores as functions of the mass and radius of stars. The neutrino luminosities are approximated for the three…

高能天体物理现象 · 物理学 2017-09-13 D. D. Ofengeim , M. Fortin , P. Haensel , D. G. Yakovlev , J. L. Zdunik

General relativistic spectra from accretion disks around rotating neutron stars in the appropriate space-time geometry for several different equation of state, spin rates and mass of the compact object have been computed. The analysis…

天体物理学 · 物理学 2009-10-31 S. Bhattacharyya , R. Misra , A. V. Thampan

General relativistic superfluid neutron stars have a significantly more intricate dynamics than their ordinary fluid counterparts. Superfluidity allows different superfluid (and superconducting) species of particles to have independent…

广义相对论与量子宇宙学 · 物理学 2009-11-07 G. L. Comer , R. Joynt