The Ultraviolet Galaxy Luminosity Function from GALEX data: Color Dependent Evolution at Low Redshift
Abstract
We present measurements of the FUV (1530A) and NUV (2310A) galaxy luminosity functions (LF) at low redshift (z<0.2) from GALEX observations matched to the 2dF Galaxy Redshift Survey. We split our FUV and NUV samples into two UV-bj color bins and two redshift bins. As observed at optical wavelengths, the local LF of the bluest galaxies tend to have steeper faint end slopes and fainter characteristic magnitudes M* than the reddest subsamples. We find evidence for color dependent evolution at very low redshift in both bands, with bright blue galaxies becoming dominant in the highest redshift bin. The evolution of the total LF is consistent with an 0.3 magnitude brightening between z=0 and 0.13, in agreement with the first analysis of deeper GALEX fields probing adjacent and higher redshifts.
Cite
@article{arxiv.astro-ph/0411308,
title = {The Ultraviolet Galaxy Luminosity Function from GALEX data: Color Dependent Evolution at Low Redshift},
author = {M. Treyer and T. Wyder and D. Schiminovich and S. Arnouts and T. Budavari and B. Milliard and T. Barlow and L. Bianchi and Y. -I. Byun and J. Donas and K. Forster and P. Friedman and T. Heckman and P. Jelinsky and Y. -W. Lee and B. Madore and R. Malina and D. C. Martin and P. Morrissey and S. Neff and R. M. Rich and O. H. W. Siegmund and T. Small and A. Szalay and B. Welsh},
journal= {arXiv preprint arXiv:astro-ph/0411308},
year = {2009}
}
Comments
This paper will be published as part of the Galaxy Evolution Explorer (GALEX) Astrophysical Journal Letters Special Issue. Links to the full set of papers will be available at : http://www.galex.caltech.edu/PUBLICATIONS/ after November 22, 2004