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HESS J1731-347 is likely a Quark Star Based on the Density-Dependent vMIT Bag Model

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arxiv 2404.14775 v3 pith:VYFYTH2J submitted 2024-04-23 nucl-th

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keywords quarkdensity-dependenthessinteractionj1731-347mattermodelpressure
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abstract

In this study, we extend the MIT bag model by incorporating the vector interaction among quarks and introducing a density-dependent bag pressure.Then we proceed to investigate the thermodynamic properties of strange quark matter (SQM) and pure up-down quark matter (udQM) in quark stars (QSs).Our findings demonstrate that the density dependence of bag pressure $B(n_b)$ and the vector interaction $G_V$ among quarks can significantly stiffen the equation of state (EOS) for both SQM and udQM which allows for the description of massive compact stars such as those observed in GW190814 and PSR J0740+6620 as plausible candidates for QSs.Ultimately, we derived a series of mass-radius relations of QS based on several combinations of ($B_{as}$, $\beta$). Our results support the hypothesis that HESS J1731-347 is a quark star.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Strange quark stars in modified vector MIT bag model: role of $\rho$ and $\phi$ mesons

    hep-ph 2025-01 reject novelty 5.0 of 10

    Adding rho and phi vector mesons to the vector MIT bag model is claimed to stiffen the strange quark star equation of state and raise the maximum mass to about 2.5 solar masses, but the energy-density formula misses a...

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