Elementary excitations in homogeneous neutron star matter

Abstract

We study the collective density modes which can affect neutron-star thermodynamics in the baryonic density range between nuclear saturation (${\rho }_0$) and $3{\rho }_0$. In this region, the expected constituents of neutron-star matter are mainly neutrons, protons and electrons ($npe$ matter), under the constraint of beta equilibrium. The elementary excitations of this $npe$ medium are studied in the RPA framework. We emphasize the effect of Coulomb interaction, in particular the electron screening of the proton plasmon mode. For the treatment of the nuclear interaction, we compare two modern Skyrme forces and a microscopic approach. The importance of the nucleon effective mass is observed.

misprint corrected in Eq. (1)

References in corpus (13)

• Isospin Asymmetry in Nuclei and Neutron Stars
• Black Holes
• Effects of Strong and Electromagnetic Correlations on Neutrino Interactions in Dense Matter
• The Effects of Correlations on Neutrino Opacities in Nuclear Matter
• Many-Body Corrections to Charged-Current Neutrino Absorption Rates in Nuclear Matter
• Vector current conservation and neutrino emission from singlet-paired baryons in neutron stars
• Collective modes of asymmetric nuclear matter in Quantum HadroDynamics
• Neutrino emission due to Cooper-pair recombination in neutron stars revisited
• Vertex renormalization in weak decays of Cooper pairs and cooling compact stars
• Neutrino scattering off pair-breaking and collective excitations in superfluid neutron matter and in color-flavor locked quark matter
• Cluster formation in asymmetric nuclear matter: semi-classical and quantal approaches
• BCS approximation to the effective vector vertex of superfluid fermions
• Dispersion in a relativistic degenerate electron gas

Cited by in corpus (18)

• Core-crust transition in neutron stars: predictivity of density developments
• Superfluidity in nuclear systems and neutron stars
• Properties of the nuclear medium
• Linear response of homogeneous nuclear matter with energy density functionals
• The Effect of Quantized Magnetic Flux Lines on the Dynamics of Superfluid Neutron Star Cores
• Imprint of the symmetry energy on the inner crust and strangeness content of neutron stars
• Linear response theory in asymmetric nuclear matter for Skyrme functionals including spin-orbit and tensor terms
• Collective excitations in the neutron star inner crust
• Transport equations and linear response of superfluid Fermi mixtures in neutron stars
• Dispersion and decay of collective modes in neutron star cores
• The Photon in Dense Nuclear Matter I: Random Phase Approximation
• Elementary excitations in homogeneous superfluid neutron star matter: Role of the proton component
• Response functions of cold neutron matter: density, spin and current fluctuations
• Steady State Equilibrium Condition of $np{e}^{\pm }$ Gas and Its Application to Astrophysics
• Plasmons in strong superconductors
• Response functions of cold neutron matter: density fluctuations
• Elementary excitations in homogeneous superfluid neutron star matter: role of the neutron-proton coupling
• Coupling between superfluid neutrons and superfluid protons in the elementary excitations of neutron star matter