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

J. Iglesias-Páramo, V. Buat, J. Hernández-Fernández, C. K. Xu, D. Burgarella, T. T. Takeuchi, A. Boselli, D. Shupe, M. Rowan-Robinson, T. Babbedge, T. Conrow, F. Fang, D. Farrah, E. González-Solares, C. Lonsdale, G. Smith, J. Surace, T. A. Barlow, K. Forster, P. G. FriedmanD. C. Martin, P. Morrissey, S. G. Neef, D. Schiminovich, M. Seibert, T. Small, T. K. Wyder, L. Bianchi, J. Donas, T. M. Heckman, Y. W. Lee, B. F. Madore, B. Milliard, R. M. Rich, A. S. Szalay, B. Y. Welsh, S. K. Yi

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Abstract

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 Nl 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 lowmass galaxies increases as redshift decreases, and this trend seems to disappear for galaxies with M* > 1011 M⊙. This result is consistent with a mass-dependent evolution of the dust-to-gas ratio, which could be driven by a mass-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.

Original languageEnglish
Pages (from-to)279-294
Number of pages16
JournalAstrophysical Journal
Volume670
Issue number1
DOIs
Publication statusPublished - 2007 Nov 20

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Iglesias-Páramo, J., Buat, V., Hernández-Fernández, J., Xu, C. K., Burgarella, D., Takeuchi, T. T., Boselli, A., Shupe, D., Rowan-Robinson, M., Babbedge, T., Conrow, T., Fang, F., Farrah, D., González-Solares, E., Lonsdale, C., Smith, G., Surace, J., Barlow, T. A., Forster, K., ... Yi, S. K. (2007). 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. Astrophysical Journal, 670(1), 279-294. https://doi.org/10.1086/521867