Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-24
Astronomy and Astrophysics
Astrophysics
4 pages. To appear in the proceedings of IAU Symposium 245 "Formation and Evolution of Galaxy Bulges", M. Bureau, E. Athanasso
Scientific paper
10.1017/S1743921308017444
The dynamics of a barred galaxy depends on the pattern speed of its bar. The only direct method for measuring the pattern speed of a bar is the Tremaine-Weinberg technique. This method is best suited to the analysis of the distribution and dynamics of the stellar component. Therefore it has been mostly used for early-type barred galaxies. Most of them host a classical bulge. On the other hand, a variety of indirect methods, which are based on the analysis of the distribution and dynamics of the gaseous component, has been used to measure the bar pattern speed in late-type barred galaxies. Nearly all the measured bars are as rapidly rotating as they can be. By comparing this result with high-resolution numerical simulations of bars in dark matter halos, it is possible to conclude that these bars reside in maximal disks.
No associations
LandOfFree
Bulge properties and dark matter content of early-type barred galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Bulge properties and dark matter content of early-type barred galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulge properties and dark matter content of early-type barred galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-277544