publication . Article . Preprint . 2017

Dispersion and decay of collective modes in neutron star cores

Dmitry Kobyakov; Sanjay Reddy; Christopher J. Pethick; Achim Schwenk;
Open Access
  • Published: 23 Aug 2017 Journal: Physical Review C, volume 96 (issn: 2469-9985, eissn: 2469-9993, Copyright policy)
  • Publisher: American Physical Society (APS)
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.
Subjects
arXiv: Nuclear Experiment
free text keywords: Proton, Neutron star, Neutron, Dispersion (optics), Nuclear theory, Outer core, Physics, Electron, Atomic physics, Nuclear physics
Funded by
EC| STRONGINT
Project
STRONGINT
The strong interaction at neutron-rich extremes
  • Funder: European Commission (EC)
  • Project Code: 307986
  • Funding stream: FP7 | SP2 | ERC
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