Studying the parameters of the extended σ-ω model for neutron star matter
Henryk Niewodniczański Institute of Nuclear Physics,
2 Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Russia
3 Laboratory of Information Technologies, JINR Dubna, 141980 Dubna, Russia
4 Computational Physics and IT Division, A.I. Alikhanyan National Science Laboratory, 0036 Yerevan, Armenia
5 Wigner Research Centre for Physics, 1121 Budapest, Hungary
6 Department for Theoretical Physics, Yerevan State University, 0025 Yerevan, Armenia
a e-mail: email@example.com
Accepted: 27 October 2020
Published online: 21 December 2020
In this work we study the parameters of the extended σ-ω model for neutron star matter by a Bayesian analysis of state-of-the-art multi-messenger astronomy observations, namely mass, radius and tidal deformabilities. We have considered three parameters of the model, the Landau mass mL, the nuclear compressibility K0, and the value of the symmetry energy S0, all at saturation density n0. As a result, we are able to estimate the best values of the Landau mass of mL ≈ 0.73 GeV, whereas the values of K0 and S0 fall within already known empirical values. Furthermore, for neutron stars we find the most probable value of 13 km < R1.4 < 13.5 km and the upper mass limit of Mmax ≈ 2.2 M⊙.
© The Author(s) 2020
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