https://doi.org/10.1140/epjc/s10052-020-08800-3
Regular Article – Theoretical Physics
Quark star matter in heavy quark stars
1
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
Received:
2
April
2020
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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Funded by SCOAP3.
