The ultraviolet galaxy luminosity function from galex data: Color-dependent evolution at low redshift

Marie Treyer, Ted K. Wyder, David Schiminovich, Stéphane Arnouts, Tamás Budavari, Bruno Milliard, Tom A. Barlow, Luciana Bianchi, Yong Ik Byun, José Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young Wook Lee, Barry F. Madore, Roger F. Malina, D. Christopher Martin, Patrick Morrissey, Susan G. NeffR. Michael Rich, Oswald H.W. Siegmund, Todd Small, Alex S. Szalay, Barry Y. Welsh

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23 Citations (Scopus)

Abstract

We present measurements of the far-UV (FUV; 1530 Å) and near-UV (NUV; 2310 Å) galaxy luminosity functions (LFs) at low redshift (z ≤ 0.2) from Galaxy Evolution Explorer observations matched to the Two-Degree Field (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 mag brightening between z ∼ 0 and 0.13, in agreement with the first analysis of deeper GALEX fields probing adjacent and higher redshifts.

Original languageEnglish
Pages (from-to)L19-L22
JournalAstrophysical Journal
Volume619
Issue number1 II
DOIs
Publication statusPublished - 2005 Jan 20

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Treyer, M., Wyder, T. K., Schiminovich, D., Arnouts, S., Budavari, T., Milliard, B., Barlow, T. A., Bianchi, L., Byun, Y. I., Donas, J., Forster, K., Friedman, P. G., Heckman, T. M., Jelinsky, P. N., Lee, Y. W., Madore, B. F., Malina, R. F., Martin, D. C., Morrissey, P., ... Welsh, B. Y. (2005). The ultraviolet galaxy luminosity function from galex data: Color-dependent evolution at low redshift. Astrophysical Journal, 619(1 II), L19-L22. https://doi.org/10.1086/425302