An infrared study of a sample of optically selected galaxies

TL;DRAbstract

Infrared and optical photometry of a complete sub-sample of 194 galaxies in the Anglo-Australian Redshift Survey is presented. The Colour-Redshift diagrams are constructed and used, in a self-consistent manner, to reduce the data to zero-redshift colours at a fixed aperture size. Infrared and optical-to-ir Colour-Luminosity relations are analysed both as a function of morphological type and, in conjunction with published data, as a function of environment. An infrared Colour-Luminosity relation is found for all galaxy types. The slope seen for E-SO galaxies strengthen the hypothesis that metallicity is the driving factor in the relation at infrared and optical wavelengths. The Colour-Luminosity relations for spirals have slopes that are substantially steeper. The infrared Colour-Luminosity relations of spirals do not vary significantly with Hubble type and the type-dependence of their optical-ir Colour-Luminosity relation disappears when corrections for bulge contamination are made. Th

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