HAL : hal-00349072, version 1

arXiv : 0812.4389

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Neutron specific heat in the crust of neutron stars from the nuclear band theory

Nicolas Chamel1, Jérôme Margueron2, Elias Khan2

(11/11/2008)

The inner crust of neutron stars, formed of a crystal lattice of uclear clusters immersed in a sea of unbound neutrons, may be the nique example of periodic nuclear systems. We have calculated the neutron specific heat in the shallow part of the crust using the band theory of solids with Skyrme nucleon-nucleon interactions. We have also tested the validity of various approximations. We have found that the neutron specific heat is well described by that of a Fermi gas, while the motion of the unbound neutrons is strongly affected by the nuclear lattice. These apparently contradictory results are explained by the particular properties of the neutron Fermi surface.

1 :	IAA - Institut d'Astronomie et d'Astrophysique
2 :	IPNO - Institut de Physique Nucléaire d'Orsay

Domaine

:

Physique/Physique Nucléaire Théorique Physique/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique

Mots Clés : neutron star crust – neutron star cooling – band theory – specific heat – dynamical effective mass

hal-00349072, version 1

http://hal.archives-ouvertes.fr/hal-00349072

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Contributeur : Jérôme Margueron <>

Soumis le : Mardi 23 Décembre 2008, 12:19:12

Dernière modification le : Vendredi 16 Janvier 2009, 12:25:34