Automatic Morphological Classification of Galaxies

Details Automatic Morphological Classification of Galaxies Automatic Morphological Classification of Galaxies

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap%26ss.269..577f&link_type=abstract

Astrophysics and Space Science, v. 269/270, p. 577-583 (1999).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

Sky-survey projects under development or in the early phase of data collection will soon provide large numbers of high-quality CCD images of galaxies. We have developed a software-system for automatic morphological classification of the many galaxies in such data sets. Our steps include: automatic removal of foreground stars, deprojection of galaxies, converting images to polar coordinates (to count arms through FFT) and reduction of many signatures representing the galaxy on the image. We have developed a galaxy-catalog of 113 nearby galaxies to test our software. Some of the above parameters, together with a numerical type index and absolute magnitude found in the literature for our galaxies are subjected to principal component analysis. We find some good correlations between pairs of data, confirm findings of previous studies, and propose further statistical analysis of the data presented here.

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