Post-impact evolutionary tracks of a surviving He-star companion model in the H-R diagram (left panel) and surface gravity vs. temperature diagram (right panel). The solid lines and dash-dotted lines respectively correspond to the results of KEPLER and MESA calculations. The filled circle, square, triangle, and star markers on the tracks represent post-impact evolutionary phases of 1 yr, 1 kyr, 100 kyr, and 10 Myr after the SN impact, respectively. The thin lines and thick lines have the same meaning as those in Fig. 5.