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Abstract: It depends on the state of matter at supra-nuclear density to model pulsar-sstructure, which is unfortunately not certain due to the difficulties inphysics. In cold quark matter at realistic baryon densities of compact starswith an average value of $\sim 2-3 ho 0$, the interaction between quarks isso strong that they would condensate in position space to form quark-clusters.We argue that quarks in quark stars are grouped in clusters, then we apply twophenomenological models for quark stars, the polytropic model and Lennard-Jonesmodel. Both of the two models have stiffer EoS, and larger maximum mass forquark stars larger than 2 $M \odot$. The gravitational energy releases duringthe AIQ process could explain the observed energy of three supergiant flaresfrom soft gamma-ray repeaters $\sim 10^{47}$ ergs.



Autor: X. Y. Lai PKU

Fuente: https://arxiv.org/



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