Detection and characterization of stellar magnetic activity with Gaia

Abstract

The Gaia Data Release 2 (DR2) supplied a catalog of 147,644 late-type stars for which the analysis of the G-band photometric time series allowed the detection of the rotation period and an estimate of the magnetic activity level. The Gaia DR3 will be based on photometric time series spanning a longer time interval and will allow the detection and characterization of about 1 million stars with magnetic activity. In the present work, we show how the Gaia data allows us to study variability phenomena connected to the stellar magnetic activity and occurs on very different timescales. We also show how the Gaia data, combined with long-term photometric surveys such as all sky automated survey (ASAS), can be exploited to detect magnetic activity cycles.