Far-infrared source counts at 70 and 160 microns in Spitzer deep surveys

H. Dole; E. Le Floc'h; P. G. Pérez-González; C. Papovich; E. Egami; G. Lagache; A. Alonso-Herrero; C. W. Engelbracht; K. D. Gordon; D. C. Hines; O. Krause; K. A. Misselt; J. E. Morrison; G. H. Rieke; M. J. Rieke; J. R. Rigby; E. T. Young; L. Bai; M. Blaylock; G. Neugebauer; C. A. Beichman; D. T. Frayer; J. R. Mould; P. L. Richards

doi:10.1086/422472

Far-infrared source counts at 70 and 160 microns in Spitzer deep surveys

H. Dole, E. Le Floc'h, P. G. Pérez-González, C. Papovich, E. Egami, G. Lagache, A. Alonso-Herrero, C. W. Engelbracht, K. D. Gordon, D. C. Hines, O. Krause, K. A. Misselt, J. E. Morrison, G. H. Rieke, M. J. Rieke, J. R. Rigby, E. T. Young, L. Bai, M. Blaylock, G. NeugebauerC. A. Beichman, D. T. Frayer, J. R. Mould, P. L. Richards

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Abstract

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.

Original language	English (US)
Pages (from-to)	87-92
Number of pages	6
Journal	Astrophysical Journal, Supplement Series
Volume	154
Issue number	1
DOIs	https://doi.org/10.1086/422472
State	Published - Sep 2004

Keywords

Galaxies: evolution
Galaxies: statistics
Infrared: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/422472

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Dole, H., Le Floc'h, E., Pérez-González, P. G., Papovich, C., Egami, E., Lagache, G., Alonso-Herrero, A., Engelbracht, C. W., Gordon, K. D., Hines, D. C., Krause, O., Misselt, K. A., Morrison, J. E., Rieke, G. H., Rieke, M. J., Rigby, J. R., Young, E. T., Bai, L., Blaylock, M., ... Richards, P. L. (2004). Far-infrared source counts at 70 and 160 microns in Spitzer deep surveys. Astrophysical Journal, Supplement Series, 154(1), 87-92. https://doi.org/10.1086/422472

Dole, H, Le Floc'h, E, Pérez-González, PG, Papovich, C, Egami, E, Lagache, G, Alonso-Herrero, A, Engelbracht, CW, Gordon, KD, Hines, DC, Krause, O, Misselt, KA, Morrison, JE, Rieke, GH , Rieke, MJ, Rigby, JR, Young, ET, Bai, L, Blaylock, M, Neugebauer, G, Beichman, CA, Frayer, DT, Mould, JR & Richards, PL 2004, 'Far-infrared source counts at 70 and 160 microns in Spitzer deep surveys', Astrophysical Journal, Supplement Series, vol. 154, no. 1, pp. 87-92. https://doi.org/10.1086/422472

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abstract = "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.",

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AU - Dole, H.

AU - Le Floc'h, E.

AU - Pérez-González, P. G.

AU - Papovich, C.

AU - Egami, E.

AU - Lagache, G.

AU - Alonso-Herrero, A.

AU - Engelbracht, C. W.

AU - Gordon, K. D.

AU - Hines, D. C.

AU - Krause, O.

AU - Misselt, K. A.

AU - Morrison, J. E.

AU - Rieke, G. H.

AU - Rieke, M. J.

AU - Rigby, J. R.

AU - Young, E. T.

AU - Bai, L.

AU - Blaylock, M.

AU - Neugebauer, G.

AU - Beichman, C. A.

AU - Frayer, D. T.

AU - Mould, J. R.

AU - Richards, P. L.

PY - 2004/9

Y1 - 2004/9

N2 - 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.

AB - 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.

KW - Galaxies: evolution

KW - Galaxies: statistics

KW - Infrared: galaxies

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Far-infrared source counts at 70 and 160 microns in Spitzer deep surveys

Abstract

Keywords

ASJC Scopus subject areas

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