Regular Article – Theoretical Physics
Quark star matter in heavy quark stars
The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, 266033, Qingdao, China
2 The Research Center of Theoretical Physics, Qingdao University of Technology, 266033, Qingdao, China
3 School of Mathematics and Physics, Qingdao University of Science and Technology, 266033, Qingdao, China
4 Qingdao University of Technology, 266033, Qingdao, China
5 Quantum physics laboratory, Qingdao University of Technology, 266033, Qingdao, China
6 School of Nuclear Science and Technology, University of South China, 421001, Hengyang, China
7 Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, 421001, Hengyang, China
Accepted: 23 December 2020
Published online: 29 January 2021
We study the thermodynamic properties of asymmetric quark matter and large mass quark stars within the confined-isospin-density-dependent-quark-mass model. We find that the quark matter symmetry energy should be very large in order to describe the recent discovered heavy compact stars PSR J0348+0432 (), MSP J0740+6620 ( of 68.3 credibility interval and of 95.4 credibility interval) and PSR J2215+5135 (2.27) as QSs. The tidal deformability of the QSs is also investigated in this work, and the result indicates that may depend on the isospin effects and the strength / orientation distribution of the magnetic fields inside the quark stars.
© The Author(s) 2021
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