Constraining quark-hadron interface tension in the multimessenger era

Xia, C.-J.*; Maruyama, Toshiki  ; Yasutake, Nobutoshi*; Tatsumi, Toshitaka*

We study the interface effects of a quark-hadron mixed phase in compact stars. The properties of nuclear matter are obtained based on the relativistic-mean-field model. For the quark phase, we adopt a perturbation model with running quark masses and coupling constant. At certain choices of parameter sets, it is found that varying the quark-hadron interface tension will have sizable effects on the radii ( m) and tidal deformabilities (%) of 1.36 solar mass hybrid stars. These provide possibilities for us to constrain the quark-hadron interface tension with future gravitational wave observations as well as the ongoing NICER mission.