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Multicolor Luminosity Function of Field Galaxies

Published online by Cambridge University Press:  25 May 2016

A. Brunello ,
P. Saracco ,
B. Garilli ,
D. Maccagni  and
G. Chincarini
A. Brunello
Affiliation:
IFCTR-CNR, Via Bassini 15,20133 Milano, Italy
P. Saracco
Affiliation:
IFCTR-CNR, Via Bassini 15,20133 Milano, Italy
B. Garilli
Affiliation:
IFCTR-CNR, Via Bassini 15,20133 Milano, Italy
D. Maccagni
Affiliation:
IFCTR-CNR, Via Bassini 15,20133 Milano, Italy
G. Chincarini
Affiliation:
Osservatorio Astronomico di Brera, Via Brera 28,20121 Milano, Italy

Extract

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The aim of this programme is to determine the luminosity function of field galaxies in different bands for a unique sample. From the ESP [1] redshift survey of 3344 bj ≤ 19.4 galaxies, we have extracted a fair subsample and obtained multicolor photometry for 354 (11%) galaxies in the V, R (Johnson) and i (Gunn) filters and for 148 (4%) in the K′ band. Errors on the total magnitudes are smaller than 0.1 in all bands. In order to obtain absolute magnitudes, we applied k-corrections [2] after deriving a rough morphological classification based on color information. Here we present a by product of this programme: the determination of the color-luminosity relationship. The figure shows how the rest-frame Bj-K' color is strongly related to the absolute i magnitude while such correlation is not present using optical colors. If we assume Mi is a good mass tracer, the figure indicates that bluer galaxies are the less massive ones.

Type
III. Galaxy Formation and Evolution
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 156
Copyright
Copyright © Kluwer 1999 

References

[1] Vettolani, G. et al. (1997) The ESO Slice Project (ESP) galaxy redshift survey. I. Description and first results, A&A, Vol. 325, pp. 954–960 Google Scholar
[2] Frei, Z., Gunn, J.E. (1994) Generating colors and k corrections from existing catalog data, AJ, Vol. 108. II, pp. 1476–1485 Google Scholar