Chromophores Stars 8 article 8 chemistry 8 Astrophysics 6 Excited states 6 Fluorescence 6 Lomb-scargle periodogram 6 Nitrogen compounds 6 Stars: activity 6 chemical structure 6 Atoms 4 Calcium 4 Chromospheric activity 4 Crystallography, X-Ray 4 Fluorescence switching 4 Ions 4 Isomers 4 Models, Molecular 4 Molecular skeleton 4 Operating principles 4 Optical resolving power 4 Raman spectroscopy 4 Single molecule level 4 Solvents 4 Spectrum analysis 4 Stars: chromospheres 4 Stars: individual 4 Stars: solar types 4 Super resolution imaging 4