The term blue dwarf refers to various types of stars having a peak emission in blue or ultraviolet. Those can be:
Astronomical objects A blue compact dwarf galaxy An early-type main-sequence star B-type main-sequence star O-type main-sequence star OB star Blue dwarf (red-dwarf stage), a hypothetical stage in red dwarf interstellar evolution O-type subdwarf B-type subdwarf
See also Blue star (disambiguation) Blue giant (disambiguation)