A complete galaxy redshift sample. IV - Optical and infrared colour-luminosity relations

Astronomy and Astrophysics – Astronomy

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Color, Galaxies, Infrared Photometry, Luminosity, Red Shift, Local Group (Astronomy), Metallicity, Spiral Galaxies, Virgo Galactic Cluster

Scientific paper

Infrared and optical data for a subsample of 194 galaxies in the Anglo-Australian Redshift Survey are presented. The data reduction, and redshift and K-corrections are described. The infrared and optical-to-infrared E/S0 and spiral color-luminosity (C-L) relations are analyzed and compared in terms of morphological type and environment. The intrinsic scatter and universality of the C-L relations are examined. It is observed that there is a C-L relation for E/S0 in optical-infrared and infrared colors and that metallicity is the factor which determines the galaxy colors at all wavelengths studied; the spiral C-L relations have a steeper slope than E/S0 and this reveals a stronger correlation between enrichment and luminosity.

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