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arXiv · 2009.12571

Bayesian inference of quark star equation of state using the NICER PSR J0030+0451 data

Ang Li·Zhi-Qiang Miao·Jin-Liang Jiang·Shao-Peng Tang·Ren-Xin Xu
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Abstract

We constrain the equation of state of quark stars within the Bayesian statistical approach using the mass and radius measurements of PSR J0030+0451 from NICER. Three types of bag models, with and without non-zero finite quark mass and/or superfluidity, are employed for quark stars made up with self-bound strange quark matter. We find the $90\%$ posterior credible boundary around the most probable values of the quark star maximum mass is $M_{\rm TOV}=2.38_{-0.23}^{+0.26}\,M_{\odot}$, within the model flexibility of the finite quark mass, the quark pairing gap, and the perturbative contribution from the one-gluon exchange. The radius of a canonical $1.4\,M_{\odot}$ quark star is $R_{\rm 1.4}\sim12.3\,{\rm km}$, smaller than the results based on neutron star models.

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Ang Li, Zhi-Qiang Miao, Jin-Liang Jiang, Shao-Peng Tang, Ren-Xin Xu. 2020-09-26. Bayesian inference of quark star equation of state using the NICER PSR J0030+0451 data. https://doi.org/10.1093/mnras/stab2029

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