UV to IR SEDs of UV-selected galaxies in the ELAIS fields: Evolution of dust attenuation and star formation activity from z=0.7 to 0.2

作者：Iglesias Paramo J^*; Buat V; Hernandez Fernandez J; Xu C K; Burgarella D; Takeuchi T T; Boselli A; Shupe D; Rowan Robinson M; Babbedge T; Conrow T; Fang F; Farrah D; Gonzalez Solares E; Lonsdale C; Smith G; Surace J; Barlow T A; Forster K; Friedman P G; Martin D C; Morrissey P; Neff S G; Schiminovich D; Seibert M; Small T; Wyder T K; Bianchi L; Donas J; Heckman T M; Lee Y W; Madore B F; Milliard B; Rich R M

来源：Astrophysical Journal, 2007, 670(1): 279-294.

• galaxies : evolution
• surveys
• ultraviolet : galaxies

We study the ultraviolet to far-infrared (hereafter UV-to-IR) SEDs of a sample of intermediate-redshift (0.2 <= z <= 0.7) UV-selected galaxies from the ELAIS N1 and ELAIS N2 fields by fitting a multi-wavelength data set to a library of GRASIL templates. Star formation related properties of the galaxies are derived from the library of models by using Bayesian statistics. We find a decreasing presence of galaxies with low attenuation and low total luminosity as redshift decreases, which does not hold for high total luminosity galaxies. In addition, the dust attenuation of low-mass galaxies increases as redshift decreases, and this trend seems to disappear for galaxies with M* >= 10(11) M-circle dot. This result is consistent with amass-dependent evolution of the dust-to-gas ratio, which could be driven by amass-dependent efficiency of star formation in star-forming galaxies. The specific star formation rates (SSFR) decrease with increasing stellar mass at all redshifts, and for a given stellar mass the SSFR decreases with decreasing redshift. The differences in the slope of the M*-SSFR relation found between this work and others at similar redshift could be explained by the adopted selection criteria of the samples, which for a UV-selected sample, favors blue, star-forming galaxies.

• 出版日期2007-11-20