2020/06/30 by David Alvarez-Castillo, Alexander Ayriyan, G. G. Barnaföldi +4
Mathematics · Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics #Compressibility #Equation of state #Gamma-ray bursts and supernovae #Mathematics #Neutron #Neutron star #Nuclear physics #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #RADIUS #Saturation (graph theory) #astro-ph.HE #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjst/e2020-000106-4
published as Eur. Phys. J. Special Topics 229, 22-23, 3615-3628 (2020) · 14 pages, 15 figures, 2 tables. Typos corrected
openalex created_date 2020/06/12 · openalex publication_date 2020/12/01 · arxiv created 2020/12/10 · arxiv updated 2021/01/26 · openalex updated_date 2026/08/05
Abstract 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 m L , the nuclear compressibility K 0 , and the value of the symmetry energy S 0 , all at saturation density n 0 . As a result, we are able to estimate the best values of the Landau mass of m L ≈ 0.73 GeV, whereas the values of K 0 and S 0 fall within already known empirical values. Furthermore, for neutron stars we find the most probable value of 13 km < R 1.4 < 13.5 km and the upper mass limit of M max ≈ 2.2 M ⊙ .