Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 410, Issue 4, Pages 2749-2759Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2010.17650.x
Keywords
methods: statistical; galaxies: evolution; galaxies: high-redshift; submillimetre: diffuse background
Categories
Funding
- NASA
- DNRF
- IDA
- W. M. Keck Foundation
- UK Science and Technology Facilities Council (STFC)
- STFC [ST/F008694/1, ST/F00298X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F008694/1, ST/F00298X/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0838222] Funding Source: National Science Foundation
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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 (sigma similar to 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 mu m flux densities > 25 mu Jy, we resolve 31-45 per cent of the 1.16 mm background. Repeating our analysis on the SCUBA 850 mu m map, we resolve a higher percentage (40-64 per cent) of the 850 mu m 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.
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