First line: RV jitter for F stars (left) and G+K stars (right) vs. Log for all our simulations, in red (averaged in Log bins, ΔTspot₁), black contours (levels for 1, 100, 500, and 1000 simulations, ΔTspot₁), and orange contours (level-one simulation, ΔTspot₂). The green solid line indicates the law derived by Saar et al. (1998), and the two dashed green lines indicate the approximate range of RV jitter that was covered by their observations. Second line: same with a comparisonwith Wright (2005). Third and fourth lines: same with a comparison with Santos et al. (2000) for the first three panels (F, G, and K separately). The last panel represents the entire RV jitter vs. B− V. The two green lines indicate the lower and upper bounds of RV jitter values found by Santos et al. (2000).