We present a study of the optical (BRI) and near-infrared (JHK) luminosity fuctions (LFs) of the GEMS sample of 60 nearby groups of galaxies between 0.01 < z <0.04, with our optical CCD photometry and near-IR photometry from the 2MASS survey. The LFs in all filters show a depletion of galaxies of intermediate luminosity, two magnitudes fainter than L*, within 0.3R500 from the centres of X-ray faint groups. This feature is not as pronounced in X-ray bright gropus, and vanishes when LFs are found out to R500, even in the X-ray dim groups. We argue that this feature arises due to the enhanced merging of intermediate-mass galaxies in the dynamically sluggish environment of low velocity-dispersion groups, indicating that merging is important in galaxy evolution even at z ∼ 0. © 2007 Springer.
CITATION STYLE
Raychaudhury, S., & Miles, T. A. (2007). The optical and near-infrared properties of nearby groups of galaxies. In ESO Astrophysics Symposia (Vol. 2007, pp. 279–284). https://doi.org/10.1007/978-3-540-71173-5_46
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