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Ultraviolet and Far‐Infrared–selected Star‐forming Galaxies atz = 0: Differences and Overlaps

C. Kevin Xu, Veronique Buat, Jorge Iglesias‐Paramo, Tsutomu T. Takeuchi, Tom A. Barlow, Luciana Bianchi, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young‐Wook Lee (+14 others)
2006 Astrophysical Journal  

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2006 pre-print
arXiv:astro-ph/0604058v1 fatcat:sobi4xl7lzeozcmw3dxh6ks4de
We study two samples of local galaxies, one is UV (GALEX) selected and the other FIR (IRAS) selected, to address the question whether UV and FIR surveys see the two sides ('bright' and 'dark') of the star formation of the same population of galaxies or two different populations of star forming galaxies. No significant difference between the L_tot (=L_60+L_FUV) luminosity functions of the UV and FIR samples is found. Also, after the correction for the 'Malmquist bias' (bias for flux limited
more » ... es), the FIR-to-UV ratio v.s. L_tot relations of the two samples are consistent with each other. In the range of 9 (L_tot/L_) 12, both can be approximated by a simple linear relation of (L_60/L_FUV)=(L_tot/L_)-9.66. These are consistent with the hypothesis that the two samples represent the same population of star forming galaxies, and their well documented differences in L_tot and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR selected sample. The contribution from these 'FIR-quiet' galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.e. the stellar mass functions) of the two samples do not show any significant difference.
doi:10.1086/504974 fatcat:isjgnhda4fd4zasocuehjqccmu
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Citation

C. Kevin Xu, Veronique Buat, Jorge Iglesias‐Paramo, Tsutomu T. Takeuchi, Tom A. Barlow, Luciana Bianchi, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young‐Wook Lee, Barry F. Madore, Roger F. Malina, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, R. Michael Rich, Susan G. Neff, David Schiminovich, Oswald H. W. Siegmund, Todd Small, Alex S. Szalay, Barry Y. Welsh, Ted K. Wyder, Sukyoung Yi. "Ultraviolet and Far‐Infrared–selected Star‐forming Galaxies atz = 0: Differences and Overlaps." Astrophysical Journal 646.2 (2006) 834-840