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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1801| AzTEC millimetre survey of the COSMOS field – III. Source catalogue over 0.72 deg² and plausible boosting by large-scale structure | |
| Itziar Aretxaga David Hughes | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Surveys – Galaxies Evolution – Cosmology Miscellaneous – S ubmillimetre Galaxies | |
| 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. | |
| Monthly Notices of the Royal Astronomical Society | |
| 2011-08 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| 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 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
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