Constraining quark-hadron interface tension in the multimessenger era

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 ($\mathrm{\Delta }R\approx 600\mathrm{m}$) and tidal deformabilities ($\mathrm{\Delta }\mathrm{\Lambda }/\mathrm{\Lambda }\approx 50\%$) 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.