The total forward ejecta mass and the shock stand-off distance resulting from a star–disk collision as a function of time, for different resolutions. The top and bottom panels show the ejecta mass and the shock stand-off distance, respectively. The ejecta mass is calculated by integrating the mass below 4H_d from the midplane of the disk. The vertical gray solid line and dashed lines indicate the times when the star is at the midplane and at a distance of 4H_d above and below the midplane, respectively.