Evolution of X-ray surface flux (left column), the EUV to X-ray ratio (middle column), and the Ly-α to X-ray ratio (right column) as functions of stellar mass. The EUV emission is calculated considering both 10–36 and 36–92 nm. In the left column, circle colours shows which out of X-ray (blue), EUV (green), and Ly-α (red) has the highest luminosity, and circles with dark outlines show that this is more luminous than the other two combined. For example, blue circles with white outlines are used when L_X > L_EUV and L_X > L_Lyα but L_X < L_EUV + L_Lyα, and blue circles with dark outlines are used when L_X > L_EUV + L_Lyα. In the middle and right columns, grey circles show our model distribution and blue, green, and red lines show our slow, medium, and fast rotator tracks. The vertical green line in the lower middle panel shows the range of values for the Sun at activity maximum.