Photometric study of polar-ring galaxies. III. Forming rings

TL;DR

This study analyzes the formation of rings in two spiral galaxies, NGC 3808B and NGC 6286, through detailed photometry, revealing accretion processes and dynamical effects that suggest polar-ring galaxies can form via matter transfer between galaxies.

Contribution

It provides detailed photometric evidence of forming rings in spiral galaxies, supporting the theory that polar-ring galaxies can originate from matter accretion.

Findings

Detection of forming rings in NGC 3808B and NGC 6286

Evidence of matter accretion influencing galaxy dynamics

Observation of peculiar rotation curves and gas emissions

Abstract

We present the results of detailed surface photometry of NGC 3808B and NGC 6286 - two spiral galaxies with possibly forming ring-like structures rotating around major axes of the galaxies. The formation of rings in NGC 3808B and NGC 6286 being accompanied by accretion of matter on galactic disk results in some interesting gasdynamical and stellardynamical effects in these galaxies. One can note, for instance, peculiar rotation curve of NGC 3808B gaseous disk; strong infrared and H-alpha emission from the galaxies; bending and flaring stellar disks in both galaxies. Our observations clearly illustrate the possibility that polar-ring galaxies may be formed as a result of matter accretion from one galaxy to another.