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A Bayesian study of quark models in view of recent astrophysical constraints

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arxiv 2309.16865 v4 pith:A4AJHBYZ submitted 2023-09-28 nucl-th

A Bayesian study of quark models in view of recent astrophysical constraints

Franciele M. da Silva , Adamu Issifu , Luiz L. Lopes , Luis C. N. Santos , D\'ebora P. Menezes This is my paper
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abstract

In this work, we perform a comparative analysis between the density-dependent quark model and the vector MIT bag model using Bayesian analysis. We use the equations of state generated by these two models to describe quark stars. We impose four recent observational astrophysical constraints on both models to determine their model-dependent parameters in an optimized manner assuming that the compact objects observed are composed entirely of self-bound quarks. The restrictions are aimed at producing stars with maximum masses $2 - 2.35$ M$_\odot$ and a mass-radii diagram compatible with the observed pulsars: PSR J0740+6620, PSR J0952-0607, PSR J0030+0451 and the compact object XMMU J173203.3-344518. With this analysis, the parameter dependence of the nuclear equation of state (EoS) of both models is restricted.

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Cited by 2 Pith papers

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  1. Rotational enhancement and stability of protoquark stars during thermal evolution

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    Rotating hot protoquark stars support up to ~40% more mass than nonrotating ones and show a clear thermal ordering, with all properties peaking in lepton-rich stages.

  2. Rotational effects in quark stars: comparing different models

    astro-ph.HE 2025-11 unverdicted novelty 5.0

    Rotation amplifies differences between the vector MIT bag and DDQM equations of state for quark stars, with MIT supporting more massive stars and a full decomposition of gravitational, internal, rotational, and bindin...