Hybrid Stars in the Light of GW170817

We have studied the effect of the tidal deformability constraint given by the binary neutron star merger event GW170817 on the equations of state (EOS) of hybrid stars. The EOS are constructed by matching the hadronic EOS described by the relativistic mean-field model and parameter sets NL3, TM1, and NL3 with the quark matter EOS described by the modified MIT bag model, via a Gibbs construction. It is found that the tidal deformability constraints along with the lower bound on the maximum mass (Mmax = 2.01 0.04 M ) significantly limits the bag model parameter space ( , a4). We also obtain upper limits on the radius of 1.4 M and 1.6 M stars as R1.4 ≤ 13.2-13.5 km and R1.6 ≤ 13.2-13.4 km, respectively, for the different hadronic EOS considered here.