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

Frontiers in Astronomy and Space Sciences

Jones, Suzy F.¹ 

[1] Department of Space, Earth, and Environment, Chalmers University of Technology, Onsala Space Observatory, Sweden

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

DOI  :  10.3389/fspas.2017.00051

学科分类：空间科学

来源: Frontiers

【 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.

【 授权许可】

CC BY