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arXiv · 2507.06837

Examining the possibility of a thick crust in the compact stellar object HESS J1731-347

Sebastian Kubis·Włodzimierz Wójcik
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Abstract

A relativistic mean-field model with a crossing term of isovector-scalar and isoscalar mesons, the Cracow crossing terms (CCT) model, has previously been shown to be capable of explaining the light and compact object HESS J1731-347 [11]. Here, the model is supplemented with a correct treatment of the phase transition. Applying the thermodynamically consistent Gibbs conditions shows that a mixed-phase system occurs in the core of the neutron star over a wide range of densities, extending up to the neutron star crust, leading to an intriguing stellar structure with a thick and massive crust.

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Sebastian Kubis, Włodzimierz Wójcik. 2026-08-31. Examining the possibility of a thick crust in the compact stellar object HESS J1731-347. https://doi.org/10.1016/j.physletb.2026.140884

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