Quark models and radial oscillations: decoding the HESS J1731-347 compact object’s equation of state

• Published in: The European physical journal. C, Particles and fields Vol. 83; no. 11; pp. 1065 - 12
• Main Authors: Rather, Ishfaq A., Panotopoulos, Grigoris, Lopes, Ilídio
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 21.11.2023; Springer Nature B.V; SpringerOpen
• Subjects: Astronomy; Astrophysics and Cosmology; Computation; Elementary Particles; Equations of state; Gravitational waves; Hadrons; Heavy Ions; Measurement Science and Instrumentation; Neutron stars; Neutrons; Nuclear Energy; Nuclear Physics; Oscillations; Phase transitions; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quark models; Quarks; Regular Article - Theoretical Physics; String Theory; Supernova remnants; Supernovae
• ISSN: 1434-6052; 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-023-12223-1

We investigate the peculiar nature of strange stars through an analysis of different quark models, i.e. vBag model and CFL model equation of states at different parameter sets, and focus on understanding the equation of state governing the intriguing central compact object (CCO) within the supernova remnant HESS J1731-347, with a mass and radius of M = 0 . 77 - 0.17 + 0.20 M ⊙ and R = 10 . 4 - 0.78 + 0.86 km, respectively. Additionally, we compare the radial oscillations of two models to determine the frequency of the HESS J1731-347 compact object at its maximum mass. The frequencies of radial oscillations are computed for each of the four EoSs considered. In total, the 10 lowest radial frequencies for each of those EoSs have been computed. By delving into these aspects, we aim at deepening our understanding of strange stars and their connection to the observed HESS J1731-347 mass-radius relationship.