Iglesias-Páramo, J. and Buat, V. and Hernández-Fernández , J. and Xu, C. K. and Burgarella, D. and Takeuchi, T. T. and Boselli, A. and Shupe, D. and Rowan-Robinson, M. and Babbedge, T. and Conrow, T. and Fang, F. and Farrah, D. and González-Solares, E. and Lonsdale, C. and Smith, G. and Surace, J. and Barlow, T. A. and Forster, K. and Friedman, P. G. and Martin, D. C. and Morrissey, P. and Neff, S. G. and Schiminovich, D. and Seibert, M. and Small, T. and Wyder, T. K. and Bianchi, L. and Donas, J. and Heckman, T. M. and Lee, Y.-W. and Madore, B. F. and Milliard, B. and Rich, R. M. and Szalay, A. S. and Welsh, B. Y. and 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). pp. 279-294. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20100222-135706376
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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 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_⊙. 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.
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| Additional Information: | © 2007 The American Astronomical Society. Received 2007 February 28; accepted 2007 July 21. We thank the anonymous referee for his/her interesting comments and suggestions that helped to improve the former version of this manuscript. Thanks are also given to Steve Donegan for his careful reading and English revision of the text. This paper has benefited from interesting discussions with G. L. Granato and L. Silva. GALEX (Galaxy Evolution Explorer) is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASA’s support for the construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. Support for this work, part of the Spitzer Space Telescope Legacy Science Program, was provided by NASA through an award issued by JPL under NASA contract 1407. This article is based on observations made with the Isaac Newton Telescope, operated on the island of La Palma by the Isaac Newton Group at the Spanish Observatorio de El Roque de los Muchachos. This work has been partially funded by the projects AYA 2004-08260-C03-02 of the Spanish PNAYA and TIC114 of the Junta de Andalucı´a. T. T. T. has been supported by Program for Improvement of Research Environment for Young Researchers from Special Coordination Funds for Promoting Science and Technology (SCF) commissioned by the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan. | ||||||||
| Group: | Space Radiation Laboratory | ||||||||
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| Subject Keywords: | galaxies : evolution; surveys; ultraviolet : galaxies | ||||||||
| Record Number: | CaltechAUTHORS:20100222-135706376 | ||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20100222-135706376 | ||||||||
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| Official Citation: | 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. Friedman, D. C. Martin, P. Morrissey, S. G. Neff, 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, and S. K. Yi 2007 ApJ 670 279-294 doi: 10.1086/521867 | ||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||
| ID Code: | 17555 | ||||||||
| Collection: | CaltechAUTHORS | ||||||||
| Deposited By: | Tony Diaz | ||||||||
| Deposited On: | 02 Mar 2010 17:30 | ||||||||
| Last Modified: | 04 Mar 2013 18:13 |
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