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Background: The inner crust of a neutron star is believed to consist of Coulomb-frustrated complex structures known as "nuclear pasta" that display interesting and unique low-energy dynamics. Purpose: To elucidate the structure and…

Nuclear Theory · Physics 2015-06-12 K. H. O. Hasnaoui , J. Piekarewicz

Neutron stars provide a unique opportunity to study strongly interacting matter under extreme density conditions. The intricacies of matter inside neutron stars and their equation of state are not directly visible, but determine bulk…

High Energy Astrophysical Phenomena · Physics 2024-09-04 Len Brandes , Chirag Modi , Aishik Ghosh , Delaney Farrell , Lee Lindblom , Lukas Heinrich , Andrew W. Steiner , Fridolin Weber , Daniel Whiteson

Neutrino emissivity from the electron $\nu\bar\nu$ bremsstrahlung in the liquid layers of the neutron star crusts is studied. Nuclear composition of matter in neutron star crusts is considered for various scenarios of neutron star…

Astrophysics · Physics 2011-05-23 P. Haensel , A. D. Kaminker , D. G. Yakovlev

We generalise the finite range momentum and density dependent Seyler-Blanchard nucleon-nucleon effective interaction to the case of interaction between two baryons. This effective interaction is then used to describe dense hadronic matter…

Nuclear Theory · Physics 2008-11-26 Sarmistha Banik , Debades Bandyopadhyay

Using the $\hbar$-expansion of the Green's function of the Hartree-Fock-Bogoliubov equation, we extend the second-order Thomas-Fermi approximation to generalized superfluid Fermi systems by including the density-dependent effective mass and…

Nuclear Theory · Physics 2016-01-29 J. C. Pei , Na Fei , Y. N. Zhang , P. Schuck

In our previous treatment of neutron stars, we have developed the model fulfilling global and not local charge neutrality. In order to implement such a model, we have shown the essential role by the Thomas-Fermi equations, duly generalized…

Solar and Stellar Astrophysics · Physics 2014-11-13 R. Belvedere , K. Boshkayev , Jorge A. Rueda , R. Ruffini

The inner structure of neutron stars is still an open question. To make progress and understand the qualitative impact of gauge interactions on the neutron star structure we study neutron stars in a modified version of QCD. In this…

High Energy Astrophysical Phenomena · Physics 2017-10-23 Ouraman Hajizadeh , Axel Maas

The properties of inhomogeneous neutron matter are crucial to the physics of neutron-rich nuclei and the crust of neutron stars. Advances in computational techniques now allow us to accurately determine the binding energies and densities of…

Nuclear Theory · Physics 2011-02-01 S. Gandolfi , J. Carlson , Steven C. Pieper

We calculate the thermal conductivity of electrons for the strongly correlated multi-component ion plasma expected in the outer layers of neutron star's crust employing a Path Integral Monte Carlo (PIMC) approach. This allows us to isolate…

High Energy Astrophysical Phenomena · Physics 2016-07-20 Alessandro Roggero , Sanjay Reddy

The properties of the outer crust of non-accreting cold neutron stars are studied by using modern nuclear data and theoretical mass tables updating in particular the classic work of Baym, Pethick and Sutherland. Experimental data from the…

Astrophysics · Physics 2008-11-26 Stefan B. Ruester , Matthias Hempel , Jurgen Schaffner-Bielich

In the most extended layer of the inner crust of neutron stars, nuclear matter is believed to form a crystal of clusters immersed in a superfluid neutron gas. Here we analyze this phase of matter within fully self-consistent…

Nuclear Theory · Physics 2026-05-25 Giorgio Almirante , Theodora Kaskitsi , Michael Urban

The properties and composition of the outer crust of nonaccreting cold neutron stars are studied by applying the model of Baym, Pethick, and Sutherland (BPS) and taking into account for the first time triaxial deformations of nuclei. Two…

Astrophysics · Physics 2008-11-26 Lu Guo , M. Hempel , J. Schaffner-Bielich , J. A. Maruhn

Matter of subnuclear density in the inner crusts of neutron stars consists of neutron-rich atomic nuclei immersed in strongly degenerate relativistic gas of electrons and strongly nonideal liquid of neutrons. We give a brief account of…

Astrophysics · Physics 2007-05-23 D. G. Yakovlev , O. Y. Gnedin , A. Y. Potekhin

We perform three-dimensional hydrodynamical simulations of the coalescence of binary neutron stars. We include the emission and backreaction of gravitational waves into the Newtonian ``Piecewise Parabolic Method''. The use of the physical…

Astrophysics · Physics 2011-05-23 H. -Th. Janka , M. Ruffert

Correct interpretation of X-ray observations of transiently accreting neutron stars requires modeling of nuclear-physical processes in these objects. We consider a chain of nuclear reactions that drives the crust composition in an accreting…

Solar and Stellar Astrophysics · Physics 2020-01-28 Nikolay N. Shchechilin , Andrey I. Chugunov

Calculations of the effects of band structure on the neutron superfluid density in the crust of neutron stars made under the assumption that the effects of pairing are small [N. Chamel, Phys. Rev. C 85, 035801 (2012)] lead to moments of…

Nuclear Theory · Physics 2017-08-16 Gentaro Watanabe , C. J. Pethick

Within both dynamical and thermodynamical approaches using the equation of state for neutron-rich nuclear matter constrained by the recent isospin diffusion data from heavy-ion reactions in the same sub-saturation density range as the…

Nuclear Theory · Physics 2009-03-15 Jun Xu , Lie-Wen Chen , Bao-An Li , Hong-Ru Ma

We develop an analytic method of inverting the Tolman-Oppenheimer-Volkoff (TOV) relations to high accuracy. In principle, a specified $\mathcal{E}\mbox{-}P$ relation gives a unique $M\mbox{-}R$ relation, and vice-versa. Our method is…

Solar and Stellar Astrophysics · Physics 2025-04-28 Boyang Sun , James M. Lattimer

Studies of neutron stars are extremely timely given the recent detection of gravitational waves from a binary neutron star merger GW170817, and an International Space Station payload NICER currently in operation that aims to determine radii…

General Relativity and Quantum Cosmology · Physics 2024-11-15 Nan Jiang , Kent Yagi

Aether Scalar-Tensor theory is a modification of general relativity proposed to explain galactic and cosmological mass discrepancies conventionally attributed to dark matter.~The theory is able to fit the cosmic microwave background and the…

General Relativity and Quantum Cosmology · Physics 2025-02-20 Christopher Reyes , Jeremy Sakstein