A remarkable double-ring galaxy in the cluster Abell 2199

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...

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Bibliographic Details
Published in:The Astronomical journal 1990-12, Vol.100, p.1766
Main Authors: Pence, William D., Oegerle, William, Borne, Kirk D.
Format: Article
Language:English
Subjects:
640105 - Astrophysics & Cosmology- Galaxies
BASIC INTERACTIONS
CHARGE-COUPLED DEVICES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COLOR
GALAXIES
GALAXY CLUSTERS
GALAXY NUCLEI
GRAVITATIONAL INTERACTIONS
IMAGE PROCESSING
INTERACTIONS
MATHEMATICAL MODELS
MORPHOLOGY
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
ORIGIN
PHOTOGRAPHY
PHYSICAL PROPERTIES
PROCESSING
RINGS
SEMICONDUCTOR DEVICES
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Summary: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. (Author)
ISSN:0004-6256
1538-3881
DOI:10.1086/115633