The peculiar, off-centered ring of the SA galaxy NGC 3611

Details The peculiar, off-centered ring of the SA galaxy NGC 3611 The peculiar, off-centered ring of the SA galaxy NGC 3611

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..615s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, June 1990, p. 615-620.

Astronomy and Astrophysics

Astronomy

1

Disk Galaxies, Galactic Structure, Astronomical Photometry, Charge Coupled Devices, Dwarf Galaxies, Galactic Nuclei, Ring Structures

Scientific paper

The discovery of a faint ring of 30 kpc diameter and absolute magnitude -15.8 + or - 1 surrounding the northeastern end of the relatively isolated, but disturbed-looking, Sa galaxy NGC 3611 is reported. This ring appears centered approximately on the edge of the main disk of NGC 3611, at 8 kpc projected distance from the nucleus. If intrinsically near circular, the ring is oriented roughly perpendicular to that disk. Four different hypotheses concerning the nature and origin of this puzzling structure are discussed. Various arguments favor the hypothesis that the ring is a classical ring galaxy formed when a small disk companion was disrupted by a near-central collision with NGC 3611 itself.

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