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Arcsecond Positions of UGC Galaxies
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
| Comparative classification of globular clusters in the galaxy and M31 using cluster analysis
The distributions of 100 globular clusters in the Galaxy and 167globular clusters in M31 in a three-dimensional space with coordinatesMV, (B-V)0, and (U-B)O are considered. A centroid method of clusteranalysis is used. Classes are identified consisting of clusters that aresimilar in their parameters. The classes are not isolated andcontinually cross each other. This may indicate continuity in theprocess of formation of the aggregate of clusters for each galaxy.Comparison of the characteristics of the clusters in both galaxies, aswell as cluster analysis of the joint distribution for both samples,showed that certain combinations of parameters are characteristic forclusters in one galaxy but atypical for those in the other. Therefore, asignificant number of clusters do not have 'twins' in the other galaxy.This indicates a possible connection between the properties of globularclusters and the properties of the parent galaxy.
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