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Hot and highly magnetized neutron star matter properties with Skyrme interactions

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Abstract

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 \(\beta \)–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.

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This manuscript has no associated data or the data will not be deposited. Authors’ comment: This is a theoretical study and there are no data associated to it.]

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Acknowledgements

I.V. thanks the support of the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 824093. OGB is a member of the Carrera del Investigador Científico of the Comisión de Investigaciones Científicas of the Provincia de Buenos Aires (CICPBA), Argentina. EB is a member of the Carrera del Investigador Científico of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.

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Authors and Affiliations

  1. Facultad de Ciencias Astronónicas y Geofísicas, Universidad Nacional de la Plata, Paseo del Bosque S/N, B1900FWA, La Plata, Argentina

    Omar G. Benvenuto & Eduardo Bauer

  2. Instituto de Astrofísica de la Plata, CCT-CONICET-UNLP, Paseo del Bosque S/N, B1900FWA, La Plata, Argentina

    Omar G. Benvenuto

  3. IFLP, CCT-CONICET-UNLP, Diagonal 113 y 63 S/N, B1900FWA, La Plata, Argentina

    Eduardo Bauer

  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

    Isaac Vidaña

Authors
  1. Omar G. Benvenuto
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  2. Eduardo Bauer
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  3. Isaac Vidaña
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Correspondence to Isaac Vidaña.

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Communicated by Jérôme Margueron.

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Benvenuto, O.G., Bauer, E. & Vidaña, I. Hot and highly magnetized neutron star matter properties with Skyrme interactions. Eur. Phys. J. A 59, 159 (2023). https://doi.org/10.1140/epja/s10050-023-01070-z

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