Formation of rings by galactic collisions

Details Formation of rings by galactic collisions Formation of rings by galactic collisions

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35..237p&link_type=abstract

XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (

Astronomy and Astrophysics

Astronomy

Galaxies: Evolution, Galaxies: Structure, Methods: Numerical

Scientific paper

We study the formation and evolution of rings in disk galaxies by the impact of a spherical companion. This study is carried out by using numerical simulations and fully self-consistent models. We have tested a number of target disk galaxies with different radial scalelengths or central radial velocity dispersion, and a number of companions with different masses and radial scalelengths. We also have tested a large number of initial conditions to produce collisions with different velocities, inclinations and impact parameters. Our main results are: (a) strong interactions (high companion mass and/or slow impact velocity) result in rings with constant expansion velocity; (b) our tested collisions are very effective to heat the disk, increasing the radial velocity dispersion; (c) the rings created by collisions are certainly density waves; (d) inclined-central collisions create inclined rings, but they are not effective to displace the nucleus of the target; (e) perpendicular-peripheral collisions are more effective to displace the nucleus, as well as to create inclined rings, which remain inclined for a long period of time (some 10^8 years).

Affiliated with

Also associated with

No associations

Rating

Formation of rings by galactic collisions 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 Formation of rings by galactic collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of rings by galactic collisions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1111338