This means that bars are formed easily. There are two theories as to why bars form in galaxies. The first idea is that they spontaneously through global disturbances in disc galaxies. Another theory is that bars are formed form interactions with near by galaxies. Both of these theories are based on numerical simulations.
Bars have a significant effect on galaxies.
They channel gas and dust to the center of the galaxies. This channeling of galactic materials to the center of the galaxy can lead to two different consequences. Starbursts can form or the gas and dust can be pulled into and feed a black hole in the center of the galaxy. Similarly to other galaxies barred galaxies have a classification system. Barred galaxies, as well as all other galaxies, are group by their appearance.