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Modern meson--exchange potential and superfluid neutron star crust matter

Oe. Elgaroey·L. Engvik·E. Osnes·F. V. De Blasio·M. Hjorth-Jensen·G. Lazzari
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Abstract

In this work we study properties of neutron star crusts, where matter is expected to consist of nuclei surrounded by superfluid neutrons and a homogeneous background of relativistic electrons. The nuclei are disposed in a Coulomb lattice, and it is believed that the structure of the lattice influences considerably the specific heat of the neutronic matter inside the crust of a neutron star. Using a modern meson--exchange potential in the framework of a local--density approximation we calculate the neutronic specific heat accounting for various shapes of the Coulomb lattice, from spherical to non--spherical nuclear shapes. We find that a realistic nucleon--nucleon potential leads to a significant increase in the neutronic specific heat with respect to that obtained assuming a uniform neutron distribution. The increase is largest for the non--spherical phase of the crust. These results may have consequences for the thermal history of young neutron stars.

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Oe. Elgaroey, L. Engvik, E. Osnes, F. V. De Blasio, M. Hjorth-Jensen, G. Lazzari. 1995-09-21. Modern meson--exchange potential and superfluid neutron star crust matter. https://doi.org/10.1103/physrevd.54.1848

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