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\label{fig:pvar_porb}  A hint of why some RG/EBs oscillate less than others. The top panel shows variability period (i.e., light curve variations due to star spots) verses orbital period. Larger symbols have higher amplitudes of stellar activity, and darker circles have stronger solar-like oscillations. Blue lines indicate resonances of $P_{\rm{var}}/P_{\rm{orb}}$. The bottom panel shows three power spectra for different RG/EBs, similar to those shown in Figure \ref{rainbowmodes}. The light blue has $\nu_{\rm{max}} \sim 4 \ \mu \rm{Hz}$ and the dark blue has $\nu_{\rm{max}} \sim 80 \ \mu \rm{Hz}$. However, the star with its power spectrum plotted in black clearly lacks solar-like oscillations. Figures from \citet{gau14}.\label{pvar_porb}