Producción CyT

The faint-end of the galaxy luminosity function in groups

Artículo

Autoría:

Gonzalez, R.E. ; Lares, M. ; Lambas, D. G. ; VALOTTO, CARLOS ALBERTO

Fecha:

2006

Editorial y Lugar de Edición:

EDP SCIENCES S A

Revista:

ASTRONOMY AND ASTROPHYSICS, vol. 445 (pp. 51-58) EDP SCIENCES S A

Resumen *

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 0.03 < z < 0.06 with virial mass range 1011~M_ȯ < M_vir < 2× 1014~M_ȯ. 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 α=-1.3 in the bright-end, and an upturn of the slope in the faint-end, M_r⪆ -18+5log~(h), to slopes -1.9<α<-1.6. We find that this feature is present also in the i,g 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. Información suministrada por el agente en SIGEVA

Palabras Clave

mass functiongalaxies: luminosity function,galaxies: clusters: generalmethods: statistical