The Overdense Environments of WISE-Selected, Ultra-Luminous, High-Redshift AGN in the Submillimeter

[摘要] The environments around \textit{WISE}-selected hot dust obscured galaxies (Hot DOGs) and \textit{WISE}/radio-selected active galactic nuclei (AGNs) at average redshifts of $z = 2.7$ and $z = 1.7$, respectively, were found to have overdensities of companion submillimetre-selected sources. The overdensities were of $\sim 2 - 3$ and $\sim 5 - 6 $, respectively, compared with blank field submm surveys. The space densities in both samples were found to be overdense compared to normal star-forming galaxies and submillimetre galaxies (SMGs). All of the companion sources have consistent mid-IR colours and mid-IR to submm ratios to SMGs. Monte Carlo simulations show no angular correlation, which could indicate protoclusters on scales larger than the SCUBA-2 1.5\,arcmin scale maps. \textit{WISE}-selected AGNs appear to be good indicators of overdense areas of active galaxies at high redshift.

[学科分类] 空间科学

[关键词] Galaxies;clusters of galaxies;high-redshift galaxies;Submillimetre galaxies;quasars