Mathematics – Logic
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..774b&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 94, Oct.-Nov. 1982, p. 774-788.
Mathematics
Logic
15
Astronomical Photography, Data Correlation, Galactic Clusters, Galactic Structure, Spiral Galaxies, Data Bases, Galactic Evolution, Morphology, Quantitative Analysis
Scientific paper
The relationships between morphological types in both the Hubble-Sandage system and the RDDO system and quantitative measurements of the integrated properties are investigated for a sample of cluster spirals. The parameters measured are integrated color, integrated H I content, position in the color-gas content relation, and 20% velocity width. It is found that there are significant differences between these parameters in the mean as a function of morphological type as well as large scatter within morphological class and conspicuous overlap between various types. It is also shown that the same differences are a strong function of visually estimated disk-to-bulge ratio (D/B). It is suggested that analysis of the physical properties of a spiral galaxy be based on quantitative measurements, rather than on the morphological type of that galaxy.
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