Constraint on the mass ratio of the two compact objects for GW170817. The left panel is for the case when the red “kilonova” being powered by the dynamical ejecta and the right panel is for the case when the blue “kilonova” being powered by the dynamical ejecta. For each panel, the top subfigure shows how dynamical ejecta mass varying with the mass ratio for different EoS. Bottom subfigure shows how the mass of compact objects vary with the mass ratio for GW170817. The gray shaded region presents the constraint results on the mass ratio.