σ(S_ph) as a function of ⟨S_ph⟩ for the Sun and the Sun-like stars. For reference, the gray dots show the G dwarfs with similar T_eff and L, but any P_rot. The Sun-like stars are indicated in red, and the shade represents the metallicity. The respective distributions are shown in red on the top and right panels. The outlined targets have spectroscopic parameters. The results from the 4 yr VIRGO g+r segments are shown with the blue circles, and the respective distributions are shown with the solid blue line. The blue star in the main panel and the dashed blue lines correspond to the full light curve, and the blue star in the color bar indicates solar metallicity.