| dc.creator | Itziar Aretxaga | |
| dc.creator | David Hughes | |
| dc.date | 2011-08 | |
| dc.date.accessioned | 2023-07-25T16:24:21Z | |
| dc.date.available | 2023-07-25T16:24:21Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1801 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7806993 | |
| dc.description | We present a 0.72 deg² contiguous 1.1-mm survey in the central area of the Cosmological Evolution Survey field carried out to a 1σ ≈ 1.26 mJy beam⁻¹ depth with the AzTEC camera mounted on the 10-m Atacama Submillimeter Telescope Experiment. We have uncovered 189 candidate sources at a signal-to-noise ratio (S/N) ≥ 3.5, out of which 129, with S/N ≥4, can be considered to have little chance of being spurious (≲2 per cent). We present the number counts derived with this survey, which show a significant excess of sources when compared to the number counts derived from the ∼0.5 deg² area sampled at similar depths in the Submillimetre Common-User Bolometer Array (SCUBA) HAlf Degree Extragalactic Survey (SHADES). They are, however, consistent with those derived from fields that were considered too small to characterize the overall blank-field population.We identify differences to be more significant in the S₁.₁ₘₘ ≳ 5mJy regime, and demonstrate that these excesses in number counts are related to the areas where galaxies at redshifts z≲ 1.1 are more densely clustered. The positions of optical–infrared galaxies in the redshift interval 0.6 ≲ z≲ 0.75 are the ones that show the strongest correlation with the positions of the 1.1-mm bright population (S₁.₁ₘₘ ≳ 5mJy ), a result which does not depend exclusively on the presence of rich clusters within the survey sampled area. Themost likely explanation for the observed excess in number counts at 1.1-mm is galaxy–galaxy and galaxy–group lensing at moderate amplification levels, which increases in amplitude as one samples larger and larger flux densities. This effect should also be detectable in other high-redshift populations. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Monthly Notices of the Royal Astronomical Society | |
| dc.relation | citation:Aretxaga, I., et al., (2011), AzTEC millimetre survey of the COSMOS field – III. Source catalogue over 0.72 deg² and plausible boosting by large-scale structure, Monthly Notices of the Royal Astronomical Society, Vol. 415(4):3831- 3850 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Inspec/Surveys – Galaxies | |
| dc.subject | info:eu-repo/classification/Inspec/Evolution – Cosmology | |
| dc.subject | info:eu-repo/classification/Inspec/Miscellaneous – S ubmillimetre | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.title | AzTEC millimetre survey of the COSMOS field – III. Source catalogue over 0.72 deg² and plausible boosting by large-scale structure | |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
