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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 607242.0, MPI für Astronomie / Publikationen_mpia
Origins of the extragalactic background at 1 mm from a combined analysis of the AzTEC and MAMBO data in GOODS-N
Authors:Penner, K.; Pope, A.; Chapin, E. L.; Greve, T. R.; Bertoldi, F.; Brodwin, M.; Chary, R.-R.; Conselice, C. J.; Coppin, K.; Giavalisco, M.; Hughes, D. H.; Ivison, R. J.; Perera, T.; Scott, D.; Scott, K.; Wilson, G.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:Monthly Notices of the Royal Astronomical Society
Issue / Number:4
Start Page:2749
End Page:2759
Audience:Not Specified
Abstract / Description:We present a study of the cosmic infrared background, which is a measure of the dust-obscured activity in all galaxies in the Universe. We venture to isolate the galaxies responsible for the background at 1 mm; with spectroscopic and photometric redshifts we constrain the redshift distribution of these galaxies. We create a deep 1.16 mm map (σ˜ 0.5 mJy) by combining the AzTEC 1.1 mm and MAMBO 1.2 mm data sets in the Great Observatories Origins Deep Survey North (GOODS-N) region. This combined map contains 41 secure detections, 13 of which are new. By averaging the 1.16 mm flux densities of individually undetected galaxies with 24 μm flux densities >25 μJy, we resolve 31-45 per cent of the 1.16 mm background. Repeating our analysis on the SCUBA 850 μm map, we resolve a higher percentage (40-64 per cent) of the 850 μm background. A majority of the background resolved (attributed to individual galaxies) at both wavelengths comes from galaxies at z > 1.3. If the ratio of the resolved submillimetre to millimetre background is applied to a reasonable scenario for the origins of the unresolved submillimetre background, 60-88 per cent of the total 1.16 mm background comes from galaxies at z > 1.3.
Free Keywords:methods: statistical; galaxies: evolution; galaxies: high-redshift; submillimetre: diffuse background
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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