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Related papers: Microscopic Study of Nuclear "Pasta" by Quantum Mo…

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Nuclear pasta, with non-spherical shapes, is expected near the base of the crust in neutron stars. Large scale molecular dynamics simulations of pasta show long lived topological defects that could increase electron scattering and reduce…

High Energy Astrophysical Phenomena · Physics 2015-01-26 C. J. Horowitz , D. K. Berry , C. M. Briggs , M. E. Caplan , A. Cumming , A. S. Schneider

Complex and exotic nuclear geometries are expected to appear naturally in dense nuclear matter found in the crust of neutron stars and supernovae environment collectively referred to as nuclear pasta. The pasta geometries depend on the…

Nuclear Theory · Physics 2017-05-15 F. J. Fattoyev , C. J. Horowitz , B. Schuetrumpf

Background: Exotic non-spherical nuclear pasta shapes are expected in nuclear matter at just below saturation density because of competition between short range nuclear attraction and long range Coulomb repulsion. Purpose: We explore the…

Nuclear Theory · Physics 2015-07-01 M. E. Caplan , A. S. Schneider , C. J. Horowitz , D. K. Berry

Neutron-rich matter at subnuclear densities may involve complex structures displaying a variety of shapes, such as spherical, slablike, and/or rodlike shapes. These phases of the {\it nuclear pasta} are expected to exist in the crust of…

Astrophysics · Physics 2009-11-10 C. J. Horowitz , M. A. Perez-Garcia , J. Piekarewicz

After a brief history of neutron stars and supernovae recent developments are discussed. Based on modern nucleon-nucleon potentials more reliable equations of state for dense nuclear matter have been constructed. Furthermore, phase…

Astrophysics · Physics 2007-05-23 H. Heiselberg

Recent calculations indicate that in the outer parts of neutron stars nuclei are rod-like or slab-like, rather than roughly spherical. We consider the elastic properties of these phases, and argue that they behave as liquid crystals, rather…

Astrophysics · Physics 2009-10-30 C. J. Pethick , A. Y. Potekhin

We study the transport properties of nuclear pasta for a wide range of density, temperature and proton fractions, relevant for different astrophysical scenarios adopting a quantum molecular dynamics model. In particular, we estimate the…

High Energy Astrophysical Phenomena · Physics 2018-01-31 Rana Nandi , Stefan Schramm

Nuclear ``pasta'', nonspherical nuclei in dense matter, is predicted to occur in collapsing supernova cores. We show how pasta phases affect the neutrino transport cross section via weak neutral current using several nuclear models. This is…

Nuclear matter is considered to be inhomogeneous at subnuclear densities that are realized in supernova cores and neutron star crusts, and the structures of nuclear matter change from spheres to cylinders, slabs, cylindrical holes and…

Nuclear Theory · Physics 2009-10-25 Ken'ichiro Nakazato , Kazuhiro Oyamatsu , Shoichi Yamada

The mean free path of neutrino in charged and neutral current reactions is calculated for inhomogeneous nuclear matter which is expected to appear in the crust of neutron stars. The relevant cross section depends on Fermi and Gamow-Teller…

Nuclear Theory · Physics 2009-10-16 P. Grygorov , P. Gögelein , H. Müther

A number of properties of dense matter can be understood semiquantitatively in terms of simple physical arguments. We begin with the outer parts of neutron stars, and consider the density at which pressure ionization occurs, the density at…

Nuclear Theory · Physics 2020-03-18 C. J. Pethick

In the present study we investigate the static properties of nuclei in the inner crust of neutron stars. Using the Hartree-Fock method in coordinate space, together with the semiclassical approximation, we examine the patterns of phase…

Nuclear Theory · Physics 2007-05-23 Piotr Magierski , Aurel Bulgac , Paul-Henri Heenen

In the present work, we consider nuclear matter in the innermost crust of neutron stars under the presence of a strong magnetic field within the framework of a relativistic mean-field description. Two models with a different slope of the…

Nuclear Theory · Physics 2022-03-09 Xiaopeng Wang , Jing Li , Jianjun Fang , Helena Pais , Constança Providência

The effect of isospin-dependent nuclear forces on the inner crust of neutron stars is modeled within the framework of Quantum Molecular Dynamics (QMD). To successfully control the density dependence of the symmetry energy of neutron-star…

Nuclear Theory · Physics 2022-07-14 Parit Mehta , Rana Nandi , R. O. Gomes , V. Dexheimer , J. Steinheimer

An accurate description of low-density nuclear matter is crucial for explaining the physics of neutron star crusts. In the density range between approximately 0.01 fm$^{-3}$ and 0.1 fm$^{-3}$, matter transitions from neutron-rich nuclei to…

Nuclear Theory · Physics 2024-08-01 Bryce Fore , Jane Kim , Morten Hjorth-Jensen , Alessandro Lovato

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…

Nuclear Theory · Physics 2008-11-26 Andrew W. Steiner

In the framework of the relativistic mean field model with Thomas-Fermi approximation, we study the structures of low density nuclear matter in a three-dimensional geometry with reflection symmetry. The numerical accuracy and efficiency are…

Nuclear pasta, that is an inhomogeneous distribution of nuclear matter characterised by non-spherical clustered structures, is expected to occur in a narrow spatial region at the bottom of the inner crust of neutron stars, but the width of…

High Energy Astrophysical Phenomena · Physics 2021-11-09 H. Dinh Thi , A. F. Fantina , F. Gulminelli

Background: Nuclear pasta, emerging due to the competition between the long-range Coulomb force and the short-range strong force, is believed to be present in astrophysical scenarios, such as neutron stars and core-collapse supernovae. Its…

Nuclear Theory · Physics 2019-11-06 B. Schuetrumpf , G. Martínez-Pinedo , Md Afibuzzaman , H. M. Aktulga

Background: Neutron stars are astronomical systems with nucleons submitted to extreme conditions. Due to the longer range coulomb repulsion between protons, the system has structural inhomogeneities. Several interactions tailored to…

Nuclear Theory · Physics 2018-01-24 Pablo Alcain , Claudio Dorso