Superassociations in spiral galaxies with ultraviolet excess. III

Details Superassociations in spiral galaxies with ultraviolet excess. III Superassociations in spiral galaxies with ultraviolet excess. III

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....21...57p&link_type=abstract

(Astrofizika, vol. 21, July-Aug. 1984, p. 57-71) Astrophysics (ISSN 0571-7132), vol. 20, no. 4, Jan. 1985, p. 386-395. Translati

Astronomy and Astrophysics

Astronomy

8

Galactic Clusters, Galactic Nuclei, Galactic Structure, Spiral Galaxies, Ultraviolet Astronomy, H Ii Regions, Histograms, Radio Galaxies, Seyfert Galaxies, Star Distribution, Stellar Luminosity, Stellar Magnitude

Scientific paper

Observations of spiral ultraviolet galaxies containing superassociations (giant H II regions) are used in a statistical analysis. Ranges of variation and mean values are determined for the following parameters: galaxy diameter; absolute magnitudes and color; and the distance from the nucleus to the superassociation. Correlations between the different ranges of variation and mean values are noted. On the basis of the statistical correlations, it is concluded that: (1) the frequency of occurrence of spiral galaxies with superassociations among ultraviolet galaxies is a factor of two greater than among normal spirals; (2) superassociations can be found in both dwarf and giant galaxies; and (3) galaxies with stronger ultraviolet continuum emission have brighter superassociations. Superassociations in galaxies with a multinuclear structure were found to be less bright and smaller than those in mononuclear galaxies.

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