Looking for fine structures in galaxies

Details Looking for fine structures in galaxies Looking for fine structures in galaxies

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..128..289f&link_type=abstract

Astronomy and Astrophysics Supplement, v.128, p.289-297

Astronomy and Astrophysics

Astrophysics

9

Galaxies: Eso 143-G7, Hrg 54103, Ngc 5193/5193 A, Ngc 5761, Techniques: Image Processing, Mathematical Methods

Scientific paper

In order to enhance fine structure in direct CCD images of galaxies, transform processing has been employed: working in the transform domain, transform functions have been created and simple high- and low-pass filters have been applied to the images during the process. The results presented herein refer to a test sample of four galaxies: ESO 143-G7, HRG 54103, NGC 5193/5193A, and NGC 5761. It is also discussed the use of a Fourier-hologram image as a transfer function. Based on observations made at the Observatorio do Pico dos Dias, CNPq/Laboratorio Nacional de Astrofisica, Brazil; and at Las Campanas Observatory, Chile.

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