New equation of state involving Bose–Einstein condensate of antikaon for supernova and neutron star merger simulations
Birla Institute of Technology and Science, Pilani, Hyderabad Campus, 500078, Hyderabad, India
2 Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, 700064, Kolkata, India
Accepted: 23 December 2020
Published online: 8 April 2021
We compute a new equation of state table including Bose–Einstein condensate of mesons for core collapse supernova and neutron star merger simulations. Nuclei and interacting nucleons in non-uniform matter is described in an extended version of the nuclear statistical equilibrium model including excluded volume effects, whereas the uniform matter at higher densities is treated in the relativistic hadron field theory with density-dependent couplings. The equation of state table is generated for a wide range of density ( to fm), positive charge fraction (0.01–0.60) and temperature (0.1–158.48 MeV). The impact of antikaon condensate is investigated on different thermodynamic quantities for example free energy per baryon, entropy per baryon, pressure as well as compositions of matter. Furthermore, critical temperatures of antikaon condensation and the phase diagram of matter are also studied in this article.
© The Author(s), under exclusive licence to EDP Sciences, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021