Quark Models and Radial Oscillations: Decoding the HESS J1731-347 Compact Object's Equation of State

Abstract

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 $M=0.77_{-0.17}^{+0.20}{M}_{\odot }$ 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.

12 pages, 7 figures, 2 tables,

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• Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
• Spherically symmetric anisotropic strange stars
• Strange stars admixed with dark matter: equiparticle model in a two fluid approach
• Role of local anisotropy in hybrid stars
• Pair creation in hot electrosphere of compact astrophysical objects
• Confronting recent light compact star observations with color-flavor locked quark matter
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• On the Cooling of Compact Stars in Light of the HESS J1731-347 Remnant
• On Modeling Anisotropic Quark Stars: The Role of Anisotropy in Radial Oscillation Spectra
• Radial oscillations of quark stars in light of current astrophysical constraints: A comparative study
• Finding strangelets in cosmic rays from HESS J1731-347, a possible strange quark star using the Cherenkov Telescope Array Observatory
• Slowly rotating condensate dark stars beyond the mean-field approximation