Chromophores 6 Lomb-scargle periodogram Stars 6 Stars: activity 6 Astrophysics 4 Chromospheric activity 4 Stars: chromospheres 4 Stars: individual 4 Stars: solar types 4 Calcium 2 Chromospheric activities 2 Detecting activities 2 Earth (planet) 2 Flip flop circuits 2 HR 1099 2 Iron compounds 2 Polyethylene glycols 2 Rapid solidification 2 Resolution spectrum 2 Rotational modulations 2 Solar energy 2 Spectral variation 2 Stars binaries: spectroscopic 2 Stars: Activity 2 Stars: individual: HD 38858 2 Stars: solar-Type 2 Statistical moments 2 Temporal coverage 2 Ultraviolet: stars 2 V711 taus 2