Submillimeter Detections of Spitzer Space Telescope Galaxy Populations

Serjeant, S., Mortier, A. M. J., Ivison, R. J., Egami, E., Rieke, G. H., Willner, S. P., Rigopoulou, D., Alonso-Herrero, A., Barmby, P., Bei, L., Dole, H., Engelbracht, C. W., Fazio, G. G., Le Floc'h, E., Gordon, K. D., Greve, T. R., Hines, D. C., Huang, J.-S., Misselt, K. A., Miyazaki, S., Morrison, J. E., Papovich, C., PУ?rez-GonzУЕlez, P. G., Rieke, M. J., Rigby, J., & Wilson, G.
2004, The Astrophysical Journal Supplement Series, 154, 118

We present submillimeter statistical detections of galaxies discovered in the 5'У?5' Spitzer Early Release Observations (to ~4-15 ЮМJy 5 Я? at 3.6-8 ЮМm, 170 ЮМJy at 24 ЮМm) through a stacking analysis of our reanalyzed SCUBA 8 mJy survey maps and a Spitzer identification of a new submillimeter point source in the 8 mJy survey region. For sources detected at 5.8 or 8 ЮМm (154 and 111 sources, respectively), we detect positive skews in the submillimeter flux distributions at 99.2%-99.8% confidence using Kolmogorov-Smirnov tests, at both 850 and 450 ЮМm. We also marginally detect the Spitzer 24 ЮМm galaxies at 850 ЮМm at 97% confidence and place limits on the mean submillimeter fluxes of the 3.6 and 4.5 ЮМm sources. Integrating the submillimeter fluxes of the Spitzer populations, we find the 5.8 ЮМm galaxies contribute 0.12+/-0.05 nW m-2 sr-1 to the 850 ЮМm background and 2.4+/-0.7 nW m-2 sr-1 to the 450 ЮМm background; similar contributions are made by the 8 ЮМm-selected sample. We infer that the populations dominating the 5.8 and 8 ЮМm extragalactic background light also contribute around a quarter of the 850 ЮМm background and the majority of the 450 ЮМm background.

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