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Entraînement dans l'écorce d'une étoile à neutrons

Abstract : The inner crust of a neutron star, which is composed of a solid Coulomb lattice of nuclei immersed in a neutron superfluid, is studied from both a macroscopic and a microscopic level. In a first part, we develop a non relativistic but four dimensionally covariant formulation of the hydrodynamics of a perfect fluid mixture based on a variational principle. This formalism is applied to the description of neutron star crust as two fluid model, a neutron superfluid and a plasma of nuclei and electrons coupled via non dissipative entrainment effects, whose microscopic evalution is studied in a second part. Applying mean field methods beyond the Wigner-Seitz approximation, the Bragg scattering of dripped neutrons upon crustal nuclei lead to a "mesoscopic" effective neutron mass, which unlike the "microscopic" effective mass, takes very large values compared to the bare mass in the middle layers of the crust.
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Contributor : Nicolas Chamel <>
Submitted on : Tuesday, November 29, 2005 - 10:32:23 AM
Last modification on : Monday, December 14, 2020 - 9:45:56 AM
Long-term archiving on: : Friday, April 2, 2010 - 11:15:35 PM


  • HAL Id : tel-00011130, version 1


Nicolas Chamel. Entraînement dans l'écorce d'une étoile à neutrons. Physique mathématique [math-ph]. Université Pierre et Marie Curie - Paris VI, 2004. Français. ⟨tel-00011130⟩



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