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| Quark star EOSs in the light of SGRBs and GW170817 |
| Seminar Title | Quark star EOSs in the light of SGRBs and GW170817 | | | | | Speaker: | Dr. LI Ang | | | | | Affiliation: | (NYUAD) | | | | | When | Monday afternoon, Oct. 21, 14:00 p.m. | | | | | Where: | Room 302 No.3 building , Xianlin campus (PMO, CAS) | | | Welcome to Attend | | | | | ( PMO Academic Committee & Academic Circulating committee) | | | Abstract: The uncertain equation of state (EOS) of compact star plays a crucial role in the present multimessenger, multiscale astronomy. In one of the most widely-used quark star EOS models, the star properties can be characterized by the strange quark mass, an effective bag constant, the perturbative QCD corrections, as well as the gap parameter when considering quark pairing. From the constraint of SGRB observations with internal plateaus, we construct three new quark star EOSs (PMQS1, PMQS2, PMQS3) in the model for the central engine study of SGRB (1706.04720, 1606.02934). From the tidal deformability observation of the merging objects in GW170817, we provide new ranges for the model parameters and the current tidal deformability measurement implies MTOV<2.18 times the solar mass (2.32 when pairing is considered) for quark stars. We demonstrate that GW170817 has the possibility of originating from a binary quark star merger and the model has the possibility to rule out the existence of normal quark stars with future gravitational wave observations and mass measurements (1711.04312). |
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