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In our previous work, we investigated the occurrence rate of super-flares onvarious types of stars and their statistical properties, with a particularfocus on G-type dwarfs, using entire Kepler data. The said study alsoconsidered how the statistics change with stellar rotation period, which inturn, had to be determined. Using such new data, as a by-product, we found 138Kepler IDs of F and G types main sequence stars with rotation periods less thana day ($P_{\rm rot}<1$ d). On one hand, previous studies have revealed shortactivity cycles in F-type and G-type stars and the question investigated waswhether or not short-term activity cycles are a common phenomenon in thesestars. On the other hand, extensive studies exist which establish empiricalconnection between a star's activity cycle and rotation periods. In this study,we compile all available Kepler data with $P_{\rm rot}<1$ d, derive and use,established empirical relation between $P_{\rm cyc}$ and $P_{\rm rot}$ with theaim to provide predictions for very short $5.09\leq P_{\rm cyc}\leq 38.46$ dcases in a tabular form. We propose an observation to measure $P_{\rm cyc}$using monitoring program of stellar activity (e.g. activity-relatedchromospheric emission S-index) or similar means for the Kepler IDs found inthis study in order put to test the derived here empirical relations between$P_{\rm cyc}$ and $P_{\rm rot}$. We also propose an alternative method formeasuring very short $P_{\rm cyc}$, using flare-detection algorithms applied tofuture space mission data.

Prediction of short stellar activity cycles using derived and established empirical relations between activity and rotation periods