The varieties of symmetric stellar rings and radial caustics in galaxy disks

Details The varieties of symmetric stellar rings and radial caustics in galaxy disks The varieties of symmetric stellar rings and radial caustics in galaxy disks

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358...99s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, July 20, 1990, p. 99-115.

Statistics

Computation

18

Computational Astrophysics, Disk Galaxies, Galactic Structure, Interacting Galaxies, Ring Galaxies, Stellar Motions, Analytic Functions, Approximation, Naked Singularities, Three Body Problem

Scientific paper

Numerical, restricted three-body and analytic calculations are used to study the formation and propagation of cylindrically symmetric stellar ring waves in galaxy disks. It is shown that such waves can evolve in a variety of ways, depending on the amplitude of the perturbation and the potential of the target galaxy. Rings can thicken as they propagate outward, remain at a nearly constant width, or be pinched off at large radii. Multiple, closely spaced rings can result from a low-amplitude collision, while an outer ring can appear well-separated from overlapping inner rings or an apparent lens structure in halo-dominated potentials. All the single-encounter rings consist of paired fold caustics. The simple, impulsive, kinematic oscillation equations appear to provide a remarkably accurate model of the numerical simulations. Simple analytic approximations to these equations permit very good estimates of oscillation periods and amplitudes, the evolution of ring widths, and ring birth and propagation characteristics.

Affiliated with

Also associated with

No associations

Rating

The varieties of symmetric stellar rings and radial caustics in galaxy disks 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 The varieties of symmetric stellar rings and radial caustics in galaxy disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The varieties of symmetric stellar rings and radial caustics in galaxy disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1092883