The structure and dynamics of ringed galaxies. I - The morphology of galaxy rings, and statistics of their apparent shapes, relative sizes, and apparent orientations with respect to bars.

Details The structure and dynamics of ringed galaxies. I - The morphology of galaxy rings, and statistics of their apparent shapes, relative sizes, and apparent orientations with respect to bars. The structure and dynamics of ringed galaxies. I - The morphology of galaxy rings, and statistics of their apparent shapes, relative sizes, and apparent orientations with respect to bars.

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apjs...61..609b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 61, Aug. 1986, p. 609-630.

Mathematics

Logic

143

Attitude (Inclination), Barred Galaxies, Galactic Rotation, Galactic Structure, Ring Structures, Statistical Analysis, Axes Of Rotation, Density Distribution, Gas Density, Hubble Constant, Resonance

Scientific paper

The morphologic, metric, photometric, and kinematic properties of ringed galaxies are described. Physical insights which can be gained into all types of rings purely from their morphology and from statistical studies of their apparent shapes, relative sizes, and apparent orientations with respect to bars are addressed. It is concluded that inner rings in barred (SB) and weakly barred galaxies possess a wide range of intrinsic axis ratios, and that outer rings in barred galaxies possess a narrower range of intrinsic axis ratios. The distribution of apparent relative bar/ring position angles for SB outer rings strongly suggests that such rings have two preferred intrinsic alignment modes with respect to bars: a dominant perpendicular mode and a parallel mode. The nature of rings is further explored using detailed photometry and spectroscopy and NGC 1433, one of the nearest and largest examples of a ringed, barred spiral. UBVRI photographic surface photometry and H-alpha interferometry are presented for this object and are compared with the theory of resonance rings and barred spirals.

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