| dc.contributor | DAVID HANDEL HUGHES | |
| dc.contributor | ITZIAR ARETXAGA MENDEZ | |
| dc.creator | MILAGROS ZEBALLOS REBAZA | |
| dc.date | 2013-04 | |
| dc.date.accessioned | 2023-07-25T16:21:12Z | |
| dc.date.available | 2023-07-25T16:21:12Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/251 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7805471 | |
| dc.description | In this thesis we study the spatial distribution of extremely luminous high-redshift
dust-enshrouded star-forming submillimetre galaxies (SMGs) towards the environments
of 16 powerful high-redshift radio galaxies and a quasar (AGN) using
continuum observations at 1.1 mm taken with the AzTEC camera. This AGN
sample represents a subset of the ongoing AzTEC Cluster Environment Survey
(ACES). We target powerful high-redshift AGN, using them as signposts of protoclusters,
since under the ΛCDM scenario these early structures are formed in
the highest density regions of the Universe.
The number of ACES targets and the increased area covered by each AzTEC
map of our protocluster sample allows us to examine the surface density (number
counts) of SMGs towards these regions with greater significance than previous
studies. We estimate the integrated number counts for the fields of individual
ACES targets, but in the majority of cases the density of sources with S1.1mm > 4
mJy falls within the 95% confidence interval of the density of sources in a comparison
sample of unbiased blank fields. Only in the surroundings of 4C+23.56,
PKS1138-262 and MRC0355-037 do we detect individual overdensity signals of
∼ 2 with a significance of ∼ 3δ. When we perform a stacking analysis on the
complete sample of AzTEC maps, we also find an overdensity of ∼ 2, with greater
statistical significance, covering an area of 3-arcmin diameter centred on the AGN
(corresponding to a co-moving diameter of 1.7-7.5 Mpc over the redshift range
0.5 < z < 6.3 of the sample). This is in good agreement with the analysis of
previous studies. In addition, the large size of our maps allows us to establish
that beyond a radius of 1.5 arcmin, the radial surface density of SMGs falls very
quickly to reach a typical value for a blank field distribution of SMGs. The measured
angular extent of this overdensity is in agreement with estimates of the
virial radii of local clusters. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| dc.relation | citation:Zeballos-Rebaza M. | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Galaxias submilimétricas/Submillimetre galaxies | |
| dc.subject | info:eu-repo/classification/Galaxies starburst/Galaxies starburst | |
| dc.subject | info:eu-repo/classification/Evolución de las galaxias/Galaxies evolution | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/2105 | |
| dc.subject | info:eu-repo/classification/cti/2105 | |
| dc.title | Studying the formation and evolution of massive galaxies towards protoclusters using millimetre observations | |
| dc.type | info:eu-repo/semantics/doctoralThesis | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
