Tracing large-scale structure growth with SCUBA-2

Scuba在确定强大的高z射电星系(HzRGs)是早期宇宙中质量最大的星系之一方面发挥了关键作用，这些星系指向丰富的原星系团环境。理论预测，与密度较低的区域相比，星系的形成和演化在这种高密度区域以加速的速度发生。我们的项目是用Scuba-2绘制z~1.5、2.5、3.5和4.5处的HzRGs样本的大规模环境图的更大努力的一部分，目的是：1)通过光度红移识别亚毫米级选择的原始星系团成员(SMGs)，2)测量这两个时期HzRGs周围SMGs的平均过密度，3)将我们的发现与结构生长的数值模拟相比较。

SCUBA played a key role in establishing that powerful high-z radio galaxies (HzRGs) are amongst the most massive galaxies in the early Universe, pin-pointing rich proto-cluster environments. Theory predicts that the formation and evolution of galaxies occurs at an accelerated rate in such high-density regions compared to regions of lower density. Our project is part of a larger effort to map the large-scale environments of samples of HzRGs at z~1.5, 2.5, 3.5 and 4.5 with SCUBA-2 to in order to: 1) identify submillimetre-selected proto-cluster members (SMGs) via photometric redshifts, 2) measure the average overdensity of SMGs around HzRGs at these two epochs, 3) and contrast our findings with numerical simulations of structure growth.