Picture processing analysis of the optical structure of NGC 5128 /Centaurus A/

Details Picture processing analysis of the optical structure of NGC 5128 /Centaurus A/ Picture processing analysis of the optical structure of NGC 5128 /Centaurus A/

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84..284d&link_type=abstract

Astronomical Journal, vol. 84, Mar. 1979, p. 284-301. Research supported by the Research Corp., National Research Council of Can

Astronomy and Astrophysics

Astronomy

125

Astronomical Photography, Centaurus Constellation, Peculiar Galaxies, Photographic Processing, Photointerpretation, Radio Galaxies, Color Photography, Electrophotometers, Elliptical Galaxies, H Ii Regions, Interstellar Chemistry

Scientific paper

Results are presented for a detailed study of the peculiar elliptical galaxy NGC 5128 (Cen A), based on computer video analysis of several photographic plates of exceptional quality reduced to the standard UBV system. The picture-processing results and the measured properties of the elliptical and gaseous-disk components of NGC 5128 are examined, along with the distribution, spectral characteristics, and chemical composition of the H II regions in the disk. The data show that NGC 5128 consists of a giant E2 galaxy containing a significant amount of gas and dust situated predominantly in an equatorial disk where vigorous star formation is occurring. Reasons why NGC 5128 is so different from giant ellipticals in clusters are considered.

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