Anisotropic Strange Stars in the Spotlight: Unveiling Constraints through Observational Data

Abstract

Motivated by the recent suggestions that very massive pulsar (PSR J0952-0607) and very light compact object (HESS J1731-347) exist, in this article, we revisit the possibility of such objects being strange stars instead of the standard hadronic neutron stars. We study the possible presence of local anisotropy and how it affects the macroscopic properties of strange stars and compare our results with the recent constraints presented in the literature. We found that the presence of anisotropy increases the maximum mass, the radius of the canonical star, and its tidal deformability for positive values of ${\lambda }_{\mathrm{BL}}$ and the opposite for negative values. We also show that although we cannot rule out the possibility of very compact objects being standard hadronic neutron stars, strange stars easily fulfill most of the observational constraints.

arXiv comment5 pages, 2 figures, 1 table, Published in MNRAS

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• What is the nature of the HESS J1731-347 compact object?
• Quark Models and Radial Oscillations: Decoding the HESS J1731-347 Compact Object's Equation of State
• Relativistic mean field model for ultra-compact low mass neutron star of HESS J1731-347
• Hybrid stars in light of the HESS J1731-347 remnant and the PREX-II experiment
• Could a slow stable hybrid star explain the central compact object in HESS~J1731-347?
• Probing the Impact of WIMP Dark Matter on Universal Relations, GW170817 Posterior and Radial Oscillations
• Moment of inertia and compactness of quark stars within the context of $f(R,T,L_m)$ gravity
• A Bayesian study of quark models in view of recent astrophysical constraints
• Speed of sound bounds and first-order phase transitions in compact stars
• Universal relations for anisotropic interacting quark stars
• Implications of Fermionic Dark Matter Interactions on Anisotropic Neutron Stars
• Spherically symmetric anisotropic strange stars
• Role of local anisotropy in hybrid stars
• Strange stars admixed with dark matter: equiparticle model in a two fluid approach
• Confronting recent light compact star observations with color-flavor locked quark matter
• Anisotropic pressure effect on central EOS of PSR J0740+6620 in the light of dimensionless TOV equation
• Gravitational-Wave Constraints on Neutron-Star Pressure Anisotropy via Universal Relations
• On the Cooling of Compact Stars in Light of the HESS J1731-347 Remnant