Studies of two-solar-mass hybrid stars within the framework of Dyson-Schwinger equations

Tong Zhao, Shu-Sheng Xu, Yan Yan, Xin-Lian Luo, Xiao-Jun Liu, and Hong-Shi Zong

Phys. Rev. D 92, 054012 – Published 9 September 2015

Abstract

In this paper we introduce an equation of state (EOS) of quark matter within the framework of Dyson-Schwinger equations to study the structure of compact stars. The smooth crossover from hadronic matter to quark matter in the hybrid star is studied. We compare different strategies to obtain crossover EOSs and find a new way to construct two-solar-mass hybrid stars with even a relatively soft quark EOS, while earlier works showed that the quark EOS should be stiff enough to support a massive hybrid star.

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Received 6 August 2015

DOI:https://doi.org/10.1103/PhysRevD.92.054012

Authors & Affiliations

Tong Zhao¹, Shu-Sheng Xu², Yan Yan², Xin-Lian Luo³, Xiao-Jun Liu^1,*, and Hong-Shi Zong^2,4,5,†

¹Key Laboratory of Modern Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
²Department of Physics, Nanjing University, Nanjing 210093, China
³Department of Astronomy, Nanjing University, Nanjing 210093, China
⁴Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093, China
⁵State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, CAS, Beijing 100190, China

^*liuxiaojun@nju.edu.cn
^†zonghs@nju.edu.cn

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Vol. 92, Iss. 5 — 1 September 2015

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