Dispersion and decay of collective modes in neutron star cores

D. N. Kobyakov, C. J. Pethick, S. Reddy, and A. Schwenk
Phys. Rev. C 96, 025805 – Published 23 August 2017

Abstract

We calculate the frequencies of collective modes of neutrons, protons, and electrons in the outer core of neutron stars. The neutrons and protons are treated in a hydrodynamic approximation and the electrons are regarded as collisionless. The coupling of the nucleons to the electrons leads to Landau damping of the collective modes and to significant dispersion of the low-lying modes. We investigate the sensitivity of the mode frequencies to the strength of entrainment between neutrons and protons, which is not well characterized. The contribution of collective modes to the thermal conductivity is evaluated.

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  • Received 20 May 2017

DOI:https://doi.org/10.1103/PhysRevC.96.025805

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsCondensed Matter, Materials & Applied PhysicsPlasma Physics

Authors & Affiliations

D. N. Kobyakov1,2,3,*, C. J. Pethick4,5, S. Reddy6,7, and A. Schwenk2,8,9

  • 1Institute of Applied Physics of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
  • 2Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
  • 3Radiophysics Department, Lobachevsky State University, 603950 Nizhny Novgorod, Russia
  • 4The Niels Bohr International Academy, The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark
  • 5NORDITA, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
  • 6Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195-1550, USA
  • 7Department of Physics, University of Washington, Seattle, Washington 98195-1550, USA
  • 8ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
  • 9Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

  • *Corresponding author: dmitry.kobyakov@appl.sci-nnov.ru

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Issue

Vol. 96, Iss. 2 — August 2017

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