Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-05-03
Astrophys.Space Sci. 284 (2003) 531-534
Astronomy and Astrophysics
Astrophysics
4 pages and 3 figures, accepted for publication in ApJL
Scientific paper
10.1023/A:1024080917448
The time evolution of barred structures is examined under the influence of the external forces exerted by a spherical halo and by prolate halos. In particular, galaxy disks are placed in the plane including the major axis of prolate halos, whose configuration is often found in cosmological simulations. N-body disks in fixed external halo fields are simulated, so that bars are formed via dynamical instability. In the subsequent evolution, the bars in prolate halos dissolve gradually with time, while the bar pattern in a spherical halo remains almost unchanged to the end of the simulation. The decay times of the bars suggest that they can be destroyed in a time smaller than a Hubble time. Our results indicate that this dissolution process could occur in real barred galaxies, if they are surrounded by massive dark prolate halos, and the configuration adopted here is not unusual from the viewpoint of galaxy formation. For a prolate halo model, an additional simulation that is restricted to two-dimensional in-plane motions has also ended up with similar bar dissolution. This means that the vertical motions of disk stars do not play an essential role in the bar dissolution demonstrated here.
Hozumi Shunsuke
Ideta Makoto
No associations
LandOfFree
Bar Dissolution in Prolate Halos 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 Bar Dissolution in Prolate Halos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar Dissolution in Prolate Halos will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-230626