Bright galaxies in the Fornax cluster - Automated galaxy surface photometry. VII

Astronomy and Astrophysics – Astronomy

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Astronomical Photometry, Brightness, Galactic Clusters, Galactic Radiation, Luminosity, Red Shift

Scientific paper

Surface-brightness profiles are determined for all galaxies down to magnitude B = 16 in the central region of the Fornax cluster. Using existing redshift data, the distributions of surface brightnesses are determined for both the whole sample and for cluster disk galaxies only. Although both distributions peak at extrapolated central surface brightnesses = 21.7 B mag/sq arcsec, it is shown that they are, in fact, consistent with very broad distributions of disk central surface brightness once selection effects and the effects of bulge contamination of the profile are taken into account. This is in agreement with the conclusion drawn from fainter samples of galaxies in the cluster area.

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