Enhancement Of Features In Galaxy Images

Creators: Djorgovski, S.

Other:: Crawford, David L.

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Abstract

I describe and compare several image enhancement techniques, useful for morphological analysis of galaxian (or cometary) images. Such techniques can be used to search for, and investigate the properties of dust lanes, stellar disks or rings, jets, shells, tidal distortions, etc. Applications of the techniques are illustrated on CCD images of the peculiar galaxy Arp 230; this object has a rich morphology, indicative of a merger of two disk galaxies.

Additional Information

© 1986 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was completed during my stay at the Astronomy Department, University of California at Berkeley, whose hospitality and stimulative atmosphere I gratefully acknowledge. The data on Arp 230 were obtained in collaboration with Ivan King, whose NASA contract NAS5-28086 financed the computing. The data were obtained at the Cero Tololo Interamerican Observatory, which is operated by Aura, Inc., under a contract with the NSF. I thank Patricio Ugarte for assistance at the telescope, and Carl Vuosalo and Abe Oren for help with CCD data processing. The elliptical galaxy modeling routine was written by Tod Lauer. I acknowledge a partial support from the Harvard College Observatory, and the Society of Fellows, Harvard University.

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