| Issue |
A&A
Volume 445, Number 1, January I 2006
|
|
|---|---|---|
| Page(s) | 51 - 58 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361:20053277 | |
| Published online | 13 December 2005 | |
The faint-end of the galaxy luminosity function in groups
1
Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile e-mail: regonzar@astro.puc.cl
2
Grupo de Investigaciones en Astronomía Teórica y Experimental (IATE), Observatorio Astronómico de Córdoba, UNC, and Consejo Nacional de Investigaciones Científicas y Tecnológicas. (CONICET), Argentina
Received:
20
April
2005
Accepted:
8
September
2005
We compute the galaxy luminosity function in spectroscopically
selected nearby groups and clusters.
Our sample comprises 728 systems
extracted from the third release of the Sloan Digital Sky Survey in
the redshift range 
with virial mass range
.
To
compute the galaxy luminosity function, we apply a statistical
background subtraction method following usually adopted techniques.
In the r band, the composite galaxy luminosity function shows a
slope 
in the bright–end, and an upturn of the slope in
the faint–end, 
, to slopes 
.
We find that this feature is present also in the 
and z bands, and for all explored group subsamples, irrespective of
the group mass, number of members, integrated color or the presence
of a hot intra-cluster gas associated to X-ray emission.
Key words: methods: statistical / galaxies: clusters: general / galaxies: luminosity function, mass function
© ESO, 2005
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