https://doi.org/10.1051/epjconf/202227407004
Finite-temperature equation of state with hyperons
1 Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
2 Faculty of Natural Sciences and Mathematics-Skopje, Ss. Cyril and Methodius University in Skopje Arhimedova, 1000 Skopje, North Macedonia
3 Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, 08193 Barcelona, Spain
4 Institut d’ Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
5 Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany
* e-mail: hriskoch@fqa.ub.edu
** e-mail: ramos@fqa.ub.edu
*** e-mail: tolos@ice.csic.es
Published online: 22 December 2022
We present the novel finite-temperature FSU2H* equation-of-state model that covers a wide range of temperatures and lepton fractions for the conditions in proto-neutron stars, neutron star mergers and supernovae. The temperature effects on the thermodynamical observables and the composition of the neutron star core are stronger when the hyperonic degrees of freedom are considered. We pay a special attention to the temperature and density dependence of the thermal index in the presence of hyperons and conclude that the true thermal effects cannot be reproduced with the use of a constant Г law
© The Authors, published by EDP Sciences, 2022
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