Gaseous Flows in Galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

10 pages, 6 figures, review paper in the Proceedings of the IAU Symposium 245, "Formation and Evolution of Galaxy Bulges", hel

Scientific paper

10.1017/S1743921308017535

The gas component plays a major role in the dynamics of spiral galaxies, because of its dissipative character, and its ability to exchange angular momentum with stars in the disk. Due to its small velocity dispersion, it triggers gravitational instabilities, and the corresponding non-axisymmetric patterns produce gravity torques, which mediate these angular momentum exchanges. When a srong bar pattern develops with the same pattern speed all over the disk, only gas inside corotation can flow towards the center. But strong bars are not long lived in presence of gas, and multiple-speed spiral patterns can develop between bar phases, and help the galaxy to accrete external gas flowing from cosmic filaments. The gas is then intermittently driven to the galaxy center, to form nuclear starbursts and fuel an active nucleus. The various time-scales of these gaseous flows are described.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Gaseous Flows in 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 Gaseous Flows in Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gaseous Flows in Galaxies will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-688700

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.