Status : Fast rotating main sequence star with (intermittent) emission lines, especially Halpha and Hbeta. They are enshrouded by a disk, responsible for the emission ...
Status : Stars of initial mass 10 20 Mo. Spectral type : O8 B6 with luminosity types V to I. Variability : Pulsating variables with periods 0.1 0.5 days and ...
Post main sequence stars of initial mass larger than 8 10 Mo. They are hydrogen shell burning. Their spectral type is O/B(/A), their luminosity type is I. They are ...
Status : Blue Stragglers are stars on the main sequence found in globular clusters. They are more luminous and bluer than the main sequence turn off point of the ...
Status : Chromospherically active binary stars whose components are on the main sequence. X ray emission is possible. Spectral type : G K M and luminosity type ...