发稿时间:2019-09-23浏览次数:10

USTC Astronomy Colloquium Series: 2019 Spring
Recent Progress on Clustering-Lensing Discrepancy
郭宏  研究员
上海天文台
2019/09/24, 4:00pm , the 19th-floor Observatory Hall
In this talk, I’ll introduce the recent progress on the discrepancy between the measurements of the galaxy-galaxy clustering and lensing. As found by the recent literature, the current best-fitting models to the galaxy clustering measurements overestimate the corresponding galaxy-galaxy lensing measurements by 20%-40% at various scales, which raises a severe problem in using the clustering and lensing measurements to constrain the cosmology. In our recent works, we further investigate this problem by using the most recent measurements and confirm the previous conclusions.
 Prof. Hong Guo is a research professor at Shanghai Astronomical Observatory (SHAO). He got his PhD from SHAO in 2011 and worked as a postdoc fellow at Case Western Reserve University in 2011 and University of Utah at 2013, respectively. After that, he worked as a faculty member at SHAO in 2015. Prof. Guo’s primary research interests focus on using the galaxy clustering to understand the connection between galaxies and the dark matter halos.