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Far‐infrared Source Counts at 70 and 160 Microns in Spitzer Deep Surveys

Dole, H. and Le Floc'h, E. and Pérez‐González, P. G. and Papovich, C. and Egami, E. and Lagache, G. and Alonso-Herrero, A. and Engelbracht, C. W. and Gordon, K. D. and Hines, D. C. and Krause, O. and Misselt, K. A. and Morrison, J. E. and Rieke, G. H. and Rieke, M. J. and Rigby, J. R. and Young, E. T. and Bai, L. and Blaylock, M. and Neugebauer, G. and Beichman, C. A. and Frayer, D. T. and Mould, J. R. and Richards, P. L. (2004) Far‐infrared Source Counts at 70 and 160 Microns in Spitzer Deep Surveys. Astrophysical Journal Supplement Series, 154 (1). pp. 87-92. ISSN 0067-0049. doi:10.1086/422472.

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We derive galaxy source counts at 70 and 160 μm using the Multiband Imaging Photometer for Spitzer (MIPS) to map the Chandra Deep Field-South (CDF-S) and other fields. At 70 μm, our observations extend upward about 2 orders of magnitude in flux density from a threshold of 15 mJy, and at 160 μm they extend about an order of magnitude upward from 50 mJy. The counts are consistent with previous observations on the bright end. Significant evolution is detected at the faint end of the counts in both bands, by factors of 2-3 over no-evolution models. This evolution agrees well with models that indicate that most of the faint galaxies lie at redshifts between 0.7 and 0.9. The new Spitzer data already resolve about 23% of the cosmic far-infrared background at 70 μm and about 7% at 160 μm.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Papovich, C.0000-0001-7503-8482
Lagache, G.0000-0003-1492-2519
Alonso-Herrero, A.0000-0001-6794-2519
Hines, D. C.0000-0003-4653-6161
Rieke, G. H.0000-0003-2303-6519
Rieke, M. J.0000-0002-7893-6170
Rigby, J. R.0000-0002-7627-6551
Beichman, C. A.0000-0002-5627-5471
Frayer, D. T.0000-0003-1924-1122
Mould, J. R.0000-0003-3820-1740
Additional Information:© 2004. The American Astronomical Society. Received 2004 March 26. Accepted 2004 May 6. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. Support for this work was provided by NASA through contract 960785 issued by JPL/Caltech. We warmly thank J. Cadien and J.-L. Puget, and the IRS Team for providing us with the Boötes data.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Issue or Number:1
Record Number:CaltechAUTHORS:20170314-140505264
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Official Citation:H. Dole et al 2004 ApJS 154 87
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75108
Deposited By: Ruth Sustaita
Deposited On:16 Mar 2017 17:46
Last Modified:15 Nov 2021 16:30

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