Extended Skyrme Equation of State in asymmetric nuclear matter
D. Davesne, A. Pastore, J. Navarro
TL;DR
This paper develops an extended Skyrme equation of state for asymmetric nuclear matter, accurately matching microscopic calculations and compatible with observations of massive neutron stars, with analytical tools for astrophysical modeling.
Contribution
It introduces a new extended Skyrme functional constrained by microscopic results, improving the modeling of nuclear matter and neutron stars.
Findings
Accurately reproduces microscopic Brueckner-Bethe-Goldstone results
Compatible with measurements of two solar-mass neutron stars
Provides analytical expressions for astrophysical applications
Abstract
We present a new equation of state for infinite systems (symmetric, asymmetric and neutron matter) based on an extended Skyrme functional constrained by microscopic Brueckner-Bethe-Goldstone results. The resulting equation of state reproduces with very good accuracy the main features of microscopic calculations and it is compatible with recent measurements of two times Solar-mass neutron stars. We provide all necessary analytical expressions to facilitate a quick numerical implementation of quantities of astrophysical interest.
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