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Number Counts of GALEX Sources in FUV (1530A) and NUV (2310A) Bands

C. Kevin Xu·Jose Donas·Stephane Arnouts·Ted K. Wyder·Mark Seibert·Jorge Iglesias-Paramo·Jeremy Blaizot·Todd Small·Bruno Milliard·David Schiminovich·D. Christopher Martin·Tom A. Barlow·Luciana Bianchi·Yong-Ik Byun·Karl Forster·Peter G. Friedman·Timothy M. Heckman·Patrick N. Jelinsky·Young-Wook Lee·Barry F. Madore·Roger F. Malina·Patrick Morrissey·Susan G. Neff·R. Michael Rich
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Abstract

Number Counts of galaxies in two GALEX bands (FUV: 1530A and NUV: 2310A, both in AB magnitudes) are reported. They provide for the first time in the literature homogeneously calibrated number counts of UV galaxies covering continuously a very wide range of UV magnitude (14 -- 23.8). Both the FUV and NUV counts are inconsistent with a non-evolution model, while they are in good agreement with evolution models (essentially luminosity evolution) derived from the high-z UV luminosity functions of Arnouts et al. (2004). It is found that the contribution from galaxies detected by GALEX to the UV background is 0.68+-0.10 nW m-2 sr-1 at 1530A and 0.99+-0.15 nW m-2 sr-1 at 2310A. These are 66+-9% and 44+-6% of the total contributions of galaxies to the the UV background at 1530A, respectively, as estimated using the evolution models. ...

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C. Kevin Xu, Jose Donas, Stephane Arnouts, Ted K. Wyder, Mark Seibert, Jorge Iglesias-Paramo, Jeremy Blaizot, Todd Small, Bruno Milliard, David Schiminovich, D. Christopher Martin, Tom A. Barlow, Luciana Bianchi, Yong-Ik Byun, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young-Wook Lee, Barry F. Madore, Roger F. Malina, Patrick Morrissey, Susan G. Neff, R. Michael Rich. 2004-11-12. Number Counts of GALEX Sources in FUV (1530A) and NUV (2310A) Bands. https://doi.org/10.1086/425252

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