Automatic morphological classification of galaxies

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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 lind some good correlations between pairs of data, confirm findings of previous studies, and propose further statistical analysis of the data presented here.

Original languageEnglish
Pages (from-to)577-583
Number of pages7
JournalAstrophysics and Space Science
Volume269-270
Issue number1-4
Publication statusPublished - 1999

Fingerprint

galaxies
software
principal component analysis
statistical analysis
computer programs
polar coordinates
fast Fourier transformations
principal components analysis
catalogs
charge coupled devices
signatures
stars
index
removal
test
project
parameter

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Automatic morphological classification of galaxies. / Frei, Z.

In: Astrophysics and Space Science, Vol. 269-270, No. 1-4, 1999, p. 577-583.

Research output: Contribution to journalArticle

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