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AEGIS: Infrared Spectral Energy Distributions of MIPS 70 μm-selected Sources
Symeonidis, M. Rigopoulou, D. Huang, J. S. Davis, M. Ashby, M. L. N. Barmby, P. Egami, E. Fazio, G. G. Le Floc'h, E. Rieke, G. H.
Symeonidis, M.
Rigopoulou, D.
Huang, J. S.
Davis, M.
Ashby, M. L. N.
Barmby, P.
Egami, E.
Fazio, G. G.
Le Floc'h, E.
Rieke, G. H.
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Abstract
We present 0.5-160 μm spectral energy distributions (SEDs) of galaxies, detected at 70 μm with the Multiband Imaging Photometer for Spitzer (MIPS), using broadband imaging data from Spitzer and ground-based telescopes. Spectroscopic redshifts, in the range 0.2 ≤ z ≤ 1.5, have been measured as part of the Deep Extragalactic Evolutionary Probe 2 (DEEP2) project. On the basis of the SEDs, we explore the nature and physical properties of the sources. Using the optical spectra, we derive Hβ and [O II]-based star formation rates (SFRs) that are 10-100 times lower than SFR estimates based on IR and radio. The median offset in SFR between optical and IR is reduced by a factor of ~3 when we apply a typical extinction correction. We investigate mid- to far-infrared correlations for low-redshift (>0.5) and high-redshift (0.5 < z < 1.2) bins. Using this unique "far-infrared"-selected sample, we derive an empirical mid- to far-infrared relationship that can be used to estimate the infrared energy budget of galaxies in the high-redshift universe. Our sample can be used as a template to translate far-infrared luminosities into bolometric luminosities for high-redshift objects.
Description
This is the publisher's version, also available electronically from http://iopscience.iop.org/1538-4357/660/1/L73/.
Date
2007-05-01
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American Astronomical Society
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Keywords
Galaxies: fundamental parameters, Galaxies: high-redshift, Infrared: galaxies
Citation
Symeonidis, M. et al. (2007). "AEGIS: Infrared Spectral Energy Distributions of MIPS 70 μm-selected Sources." Astrophysical Journal Letters, 660(1):L73-L76. http://www.dx.doi.org/10.1086/517928.