A remarkable double-ring galaxy in the cluster Abell 2199

Details A remarkable double-ring galaxy in the cluster Abell 2199 A remarkable double-ring galaxy in the cluster Abell 2199

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100.1766p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Dec. 1990, p. 1766-1770, 2066.

Mathematics

Logic

2

Astronomical Photography, Charge Coupled Devices, Galactic Clusters, Peculiar Galaxies, Ring Galaxies, Galactic Nuclei, Image Processing, Morphology, Star Formation Rate

Scientific paper

B and R CCD images have been obtained of the morphologically peculiar galaxy A1627 + 39, which lies near the center of the rich cluster of galaxies A2199. The galaxy is determined to be a nearly face-on barred S0 galaxy containing two nonconcentric rings. The rings are quite unusual in that they are displaced in opposite directions from the galactic center. There is no color difference across the rings, indicating no recent burst of star formation. Two hypotheses for the origin of the rings have been investigated: (1) a resonance effect with the central bar, and (2) the result of an off-axis, deeply penetrating collision with another cluster member. Models of such a collision are presented, which can reproduce the observed rings. However, neither hypothesis can provide a completely satisfactory explanation of all the observations reported here.

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