Ring structures observed in normal galaxies

Details Ring structures observed in normal galaxies Ring structures observed in normal galaxies

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pazh....4..245s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 4, June 1978, p. 245-249.) Soviet Astronomy Letters, vol. 4, May-June 1978, p. 133-136.

Astronomy and Astrophysics

Astronomy

3

Galactic Structure, Ring Structures, Spiral Galaxies, Andromeda Galaxy, H Ii Regions, Kinematics, Magnetohydrodynamic Stability, O Stars, Ring Galaxies, Rotating Disks, Seyfert Galaxies, Shock Wave Propagation, Star Clusters

Scientific paper

Data are presented on the large-scale distribution of H II regions and OB associations in the Galaxy and in nearby spiral galaxies. Both H II regions and OB associations form several ring-shaped structures in each galaxy. The peaks in the distribution of OB associations are shifted toward the center of the galaxy relative to the peaks in the distribution of H II regions. The discovery of ring structures in normal galaxies appears to cast doubt on collisional theories for the origin of ring galaxies.

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