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The structure of hybrid stars within the nonperturbative framework of thefield correlator method, extended to zero-temperature limit as a quark model,has been studied. For the hadronic sector, we have used the lowest-orderconstraint variational method by employing AV18 two-body nucleon-nucleoninteraction supplemented by the phenomenological Urbana-type three-body force.For an adapted value of the gluon condensate, G2 = 0:006 GeV4, which gives thecritical temperature of about Tc ? 170 MeV, stable hybrid stars with a maximummass of 2:04M? are predicted. The stability of hybrid star has beeninvestigated for a wide range of gluon condensate value, G2, andquark-antiquark potential, V1. A hybrid equation of state fulfills theconstraints on tidal deformability and hence on the radii of the stars,extracted from the binary GW170817. Moreover, tidal deformability for differentchirp masses and different binary mass ratios of hybrid stars have beenstudied. The mass-radius relation satisfies the new constraint obtained fromthe neutron star interior composition explorer (NICER). A comprehensiveanalysis on the structure of a hybrid star and also its compactness, tidal Lovenumber, and tidal deformability has been conducted for several parameter setsof the quark equation of state. The influence of different crustal equations ofstate on the mentioned quantities has been studied. Our calculations suggestthe value of quark-antiquark potential, V1, to be around 0.08 GeV. The resultsachieved in this study are in strong concurrence with the other calculationsreported on this subject.

Structure and tidal deformability of a hybrid star within the framework of the field correlator method