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Title: Transport coefficients in superfluid neutron stars

We study the shear and bulk viscosity coefficients as well as the thermal conductivity as arising from the collisions among phonons in superfluid neutron stars. We use effective field theory techniques to extract the allowed phonon collisional processes, written as a function of the equation of state and the gap of the system. The shear viscosity due to phonon scattering is compared to calculations of that coming from electron collisions. We also comment on the possible consequences for r-mode damping in superfluid neutron stars. Moreover, we find that phonon collisions give the leading contribution to the bulk viscosities in the core of the neutron stars. We finally obtain a temperature-independent thermal conductivity from phonon collisions and compare it with the electron-muon thermal conductivity in superfluid neutron stars.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. Instituto de Ciencias del Espacio (IEEC/CSIC) Campus Universitat Autònoma de Barcelona, Facultat de Ciències, Torre C5, E-08193 Bellaterra (Barcelona) (Spain)
  2. (Germany)
  3. Tata Institute of Fundamental Research, Homi Bhaba Road, Mumbai-400005 (India)
  4. Physik Department, Technische Universität München, D-85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22499078
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; DAMPING; ELECTRON COLLISIONS; ELECTRONS; EQUATIONS OF STATE; FIELD THEORIES; MUONS; NEUTRON STARS; PHONONS; SCATTERING; SHEAR; SUPERFLUIDITY; THERMAL CONDUCTIVITY; VISCOSITY