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We study the properties of strange quark stars by employing a 3-flavorNambu-Jona-Lasinio model with both scalar-isovector and vector-isovectorinteractions. Using the constraint on the vector-isoscalar interaction strengthobtained from the elliptic flow splitting between particles and theirantiparticles in relativistic heavy-ion collisions, we investigate thedependence of the properties of strange quark stars on the vector-isovector andthe scalar-isovector interactions, and compare the results with thestate-of-art astrophysical constraints on the compact star radius and mass aswell as its tidal deformability from the GW170817 event. Results from our studyreinforce the prospect of using both heavy-ion collisions and astrophysicalobservations to provide constraints on the isovector coupling strength in quarkmatter and thus the quark matter equation of state as well as the QCD phasestructure at finite isospin chemical potentials.

Properties of strange quark stars with isovector interactions