Searching high-redshift large-scale structures:: Photometry of four fields around quasar pairs at z ∼ 1

被引:25
作者
Boris, N. V.
Sodre, L., Jr.
Cypriano, E. S.
Santos, W. A.
de Oliveira, C. Mendes
West, M.
机构
[1] Univ Sao Paulo, Dept Astron, Inst Astron Geofis & Ciencias Atmos, BR-05508900 Sao Paulo, Brazil
[2] UCL, Dept Phys & Astron, London WC1E 6BT, England
[3] So Operat Ctr, Gemini Observ AURA, La Serena, Chile
关键词
galaxies : clusters : general; galaxies : distances and redshifts; galaxies : high-redshift; large-scale structure of universe; quasars : general; X-rays : galaxies : clusters;
D O I
10.1086/519992
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have studied the photometric properties of four fields around the high-redshift quasar pairs QP 1310+0007, QP 1355 - 0032, QP 0110 - 0219, and QP 0114 - 3140 at z similar to 1 with the aim of identifying large-scale structures ( galaxy clusters or groups) around them. This sample was observed with the Gemini Multi-Object Spectograph (GMOS) at the Gemini North and South telescopes in the g ', r ', i ', and z ' bands, and our photometry is complete to a limiting magnitude of i ' similar to 24mag ( corresponding to similar to M-i '* + 2 at the redshift of the pairs). Our analysis reveals that QP 0110-0219 shows very strong and QP 1310+0007 and QP 1355-0032 show some evidence for the presence of rich galaxy clusters in direct vicinity of the pairs. On the other hand, QP 0114-3140 could be an isolated pair in a poor environment. This work suggest that z similar to 1 quasar pairs are excellent tracers of high-density environments, and the same technique may be useful to find clusters at higher redshifts.
引用
收藏
页码:747 / 756
页数:10
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