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Searching High Redshift Large-Scale Structures: Photometry of Four Fields Around Quasar Pairs at z~1

N. V. Boris·L. Sodre Jr.·E. S. Cypriano·W. A. Santos·C. Mendes de Oliveira·M. West
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Abstract

We have studied the photometric properties of four fields around the high-redshift quasar pairs QP1310+0007, QP1355-0032, QP0110-0219, and QP0114-3140 at z ~ 1 with the aim of identifying large-scale structures- galaxy clusters or groups- around them. This sample was observed with GMOS in Gemini North and South telescopes in the g', r', i', and z' bands, and our photometry is complete to a limiting magnitude of i' ~ 24 mag (corresponding to ~ M*_i' + 2 at the redshift of the pairs). Our analysis reveals that QP0110-0219 shows very strong and QP1310+0007 and QP1355-0032 show some evidence for the presence of rich galaxy clusters in direct vicinity of the pairs. On the other hand, QP0114-3140 could be an isolated pair in a poor environment. This work suggest that z ~ 1 quasar pairs are excellent tracers of high density environments and this same technique may be useful to find clusters at higher redshifts.

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N. V. Boris, L. Sodre Jr., E. S. Cypriano, W. A. Santos, C. Mendes de Oliveira, M. West. 2007-05-22. Searching High Redshift Large-Scale Structures: Photometry of Four Fields Around Quasar Pairs at z~1. https://doi.org/10.1086/519992

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