A barred irregular galaxy is an irregular version of a

barred spiral galaxy A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in about two thirds of all spiral galaxies, and generally affect both the motions of stars and interstellar gas within spiral galaxies ...

. Examples include the Large Magellanic Cloud and

NGC 6822 NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barna ...

.Norbert Przybilla, ''Quantitative Spectroscopy of Supergiants'', Munich, 2002
/ref> Some barred irregular galaxies (like the Large Magellanic Cloud) may be

dwarf spiral galaxies A dwarf spiral galaxy is the dwarf version of a spiral galaxy. Dwarf galaxies are characterized as having low luminosities, small diameters (less than 5 kpc), low surface brightnesses, and low hydrogen masses. The galaxies may be considered a ...

, which have been distorted into an irregular shape by

tidal interactions The tidal force is a gravitational effect that stretches a body along the line towards the center of mass of another body due to a gradient (difference in strength) in gravitational field from the other body; it is responsible for diverse phenomen ...

with a more massive neighbor.

References

* * Galaxy morphological types {{galaxy-stub