学术活动
学术活动

位置: 首页 > 学术活动 > 2016春季 > 正文

Exploring the Local Universe with re-Constructed Initial Density field (ELUCID) & the real space clustering of galaxies
主讲人 主持人
时间 2016-04-20 17:00:58 报告题目
首作者 People
职称 联系电话
邮箱 研究方向
主讲人简介 地点
办公室 研究院 上海交通大学
日期: 
2016/04/20        
People: 
杨小虎
Institute: 
上海交通大学

题目:Exploring the Local Universe with re-Constructed Initial Density field (ELUCID) & the real space clustering of galaxies

报 告 人:杨小虎 教授(杰青)
单 位:上海交通大学
时 间:2016年04月20日(周三) 14:30
地 点:厦门大学海韵园物理机电航空大楼573
报告摘要:We make use of the galaxy groups and thus constructed mass density field to correct for the redshift distortion effect of galaxies in the Sloan Digital Sky Survey Data Release 7 (SDSS DR7). Detailed clustering analyses using mock galaxy and group catalogues shows that our method can reliably correct for the redshift distortion effects. By applying the method to the SDSS DR7 observation, we constructed a statistically real space galaxy catalogue containing 469332 galaxies within redshift range 0.01 < z < 0.14 in the Northern Galactic Cap of SDSS DR7. We find that the famous Sloan Great Wall, the largest known structure in the Universe, is weakened in real space, indicating that filamentary structures in redshift space may be significantly enhanced due to the Kaiser effect. In addition to the statistical studies, in recent years we have carried out constrained simulations to reproduce the structure formation and evolution in the SDSS DR7 region. These studies are called as ELUCID.