https://doi.org/10.1140/epja/s10050-023-01070-z
Regular Article - Theoretical Physics
Hot and highly magnetized neutron star matter properties with Skyrme interactions
1
Facultad de Ciencias Astronónicas y Geofísicas, Universidad Nacional de la Plata, Paseo del Bosque S/N, B1900FWA, La Plata, Argentina
2
Instituto de Astrofísica de la Plata, CCT-CONICET-UNLP, Paseo del Bosque S/N, B1900FWA, La Plata, Argentina
3
IFLP, CCT-CONICET-UNLP, Diagonal 113 y 63 S/N, B1900FWA, La Plata, Argentina
4
Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy
Received:
18
April
2023
Accepted:
26
June
2023
Published online:
17
July
2023
We study the properties of hot and dense neutron star matter under the presence of strong magnetic fields using two Skyrme interactions, namely the LNS and the BSk21 ones. Asking for 
–stability and charge neutrality, we construct the equation of state of the system and analyze its composition for a range of densities, temperatures and magnetic field intensities of interest for the study of supernova and proto-neutron star matter, with a particular interest on the degree of spin-polarization of the different components. The results show that system configurations with larger fractions of spin up protons and spin down neutrons and electrons are energetically favored over those with larger fractions of spin down protons and spin up neutrons and electrons. The effective mass of neutrons and protons is found to be in general larger for the more abundant of their spin projection component, respectively, spin down neutrons and spin up protons. The effect of the magnetic field on the Helmhotz total free energy density, pressure and isothermal compressibility of the system is almost negligible for all the values of the magnetic field considered.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
