With arms that extend not from the center but from a namesake central structure, FTP, name this type of galaxy abbreviated SB, a variation from a normal spiral galaxy.
Their namesake features are explained by the projection effect model, and they may be distinguished from their counterparts by the existence of a gap in their gas PVD, caused by the unavailability of orbits around corotation. Examples of them include Maffei 2 and, maybe most famously, NGC 1356 in the Fornax cluster. The dwarf type of them is indicated by a small "m." Represented on the bottom prong of a Hubble tuning fork diagram, the Milky Way is now considered to be one. With arms that extend not from the center but from a namesake central structure, FTP, name this type of galaxy abbreviated SB, a variation from a normal spiral galaxy.
Their namesake features are explained by the projection effect model, and they may be distinguished from their counterparts by the existence of a gap in their gas PVD, caused by the unavailability of orbits around corotation.
{barred spiral} galaxy (or {spiral barred}, do not accept or prompt on spiral galaxy)