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Bp star comparison table
Subject has definition
helium variable starBp star in which the strength of the helium lines varies periodically. At the extreme phases the objects appear as helium-rich, whereas at other phases He can be very weak or absent.
helium-weak starB-type star in which the helium lines are weaker than in normal stars.
ultraviolet Ga starBp star which exhibits a strong 1414 line of Ga II in the ultraviolet spectrum .

Next B star: Bw star    Up: B star, peculiar star    Previous B star: Beta Librae