Quark star matter at finite temperature in a quasiparticle model
Peng-Cheng Chu (The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, Qingdao, 266033, China); Yao-Yao Jiang (The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, Qingdao, 266033, China); He Liu (The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, Qingdao, 266033, China, The Research Center for Theoretical Physics, Qingdao University of Technology, Qingdao, 266033, China); Zhen Zhang (Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China); Xiao-Min Zhang (The Research Center for Theoretical Physics, Science School, Qingdao University of Technology, Qingdao, 266033, China, The Research Center for Theoretical Physics, Qingdao University of Technology, Qingdao, 266033, China); et al - Show all 6 authors
We study the thermodynamic properties of asymmetric quark matter, large mass quark stars (QSs), and proto-quark stars (PQSs) within the quasiparticle model. Considering the effects of temperature within quasiparticle model can significantly influence the EOS and the entropy of strange quark matter (SQM), quark fractions in SQM, as well as the tidal deformability and the maximum mass of PQSs along the star evolution line. Our results indicate that the recent discovered heavy compact stars PSR J0348+0432, MSR J0740+6620, PSR J2215+5135, and especially the GW190814’s secondary component $$m_2$$ can be well described as QSs within the quasiparticle model. The tidal deformability for the QSs describing the heavy compact stars is extremely large, which can not well describe GW170817 as QSs, and the effects of the temperature in the heating process along the star evolution will further increase the tidal deformability and the maximum mass of PQSs.
