Barred Galaxies
Spiral galaxies come in many varieties, but for the purpose of this
page we want to divide them into
(but have a look
here):
Barred Spirals 
and
Non-Barred Spirals
The bar phenomenon is common among the disk galaxies: about one-third
show a strong bar structure and another one-third have a weaker inner
bar. The bars typically contribute between 10 and 30 percent of the
total luminosity of a galaxy. The spiral arms in barred galaxies
appear in most cases to be associated with the bar, but is not yet
clear that the bar drives the spiral structure.
[Introduction]
[My Work on the Galactic Bar]
[Other Sources]
This page is maintained by Krzysztof Z. Stanek
(kstanek@cfa.harvard.edu).
It was last updated on October 2nd, 1997.