Collective excitations in the neutron star inner crust

Abstract

We study the spectrum of collective excitations in the inhomogeneous phases in the neutron star inner crust within a superfluid hydrodynamics approach. Our aim is to describe the whole range of wavelengths, from the long-wavelength limit which can be described by macroscopic approaches and which is crucial for the low-energy part of the spectrum, to wavelengths of the order of the dimensions of the Wigner-Seitz cells, corresponding to the modes usually described in microscopic calculations. As an application, we will discuss the contribution of these collective modes to the specific heat of the "lasagna" phase in comparison with other known contributions.

10 pages, 4 figures, v2: one reference added and typos corrected

References in corpus (11)

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• Warm pasta phase in the Thomas-Fermi approximation
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• Entrainment parameters in cold superfluid neutron star core
• The entrainment matrix of a superfluid neutron-proton mixture at a finite temperature
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• The relativistic entrainment matrix of a superfluid nucleon-hyperon mixture at zero temperature
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• Elementary excitations in homogeneous neutron star matter
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Cited by in corpus (17)

• Superfluidity in nuclear systems and neutron stars
• Equation of state and thickness of the inner crust of neutron stars
• Low-energy collective excitations in the neutron star inner crust
• The neutron star inner crust and symmetry energy
• Superfluid hydrodynamics in the inner crust of neutron stars
• Imprint of the symmetry energy on the inner crust and strangeness content of neutron stars
• Viscosity of neutron star matter and $r$-modes in rotating pulsars
• Liquid-gas coexistence vs. energy minimization with respect to the density profile in the inhomogeneous inner crust of neutron stars
• Collective Modes in a Superfluid Neutron Gas within the Quasiparticle Random-Phase Approximation
• Linear response theory in asymmetric nuclear matter for Skyrme functionals including spin-orbit and tensor terms
• Long-wavelength phonons in the crystalline and pasta phases of neutron-star crusts
• Collective Modes in the Superfluid Inner Crust of Neutron Stars
• Response functions of cold neutron matter: density, spin and current fluctuations
• Superfluid liquid crystals: pasta phases in neutron star crusts
• Neutron Star Crust and Molecular Dynamics Simulation
• Shape stability of pasta phases: Lasagna case
• Dynamical scheme for computing the mass parameter of a system in a medium