I will introduce some of our recent work focused on the measurement and modeling of galaxy distribution. We have developed a new method called PAC to make use of the complementary information from redshift and photometric galaxy surveys. With this method, we are able to significantly improve the measurements of some important observational quantities such as the galaxy stellar mass function and the stellar halo mass relation (SHMR). With these improvements for BOSS galaxies in particular, I will show that both galaxy and CMB lensing by the BOSS galaxies is in perfect agreement with the Planck cosmology, indicating the S8 tension is gone once the lens is accurately and correctly modeled. We have also extended our study to the problem of galaxy quenching to quantify the role of environment.
BIO
Yipeng Jing is a professor of Shanghai Jiao Tong University (SJTU). His research area is mainly on the formation and evolution of galaxies and on the large-scale structures in the Universe. He got his PhD from the International School for Advanced Studies, Italy in 1992. He had worked for twelve years as a professor at Shanghai Astronomical Observatory before he moved to SJTU in 2012. He was elected to a member of the Chinese Academy of Sciences in 2015, became the founding director of the Department of Astronomy in SJTU in 2017, and served as the President of the Chinese Astronomical Society from 2018 to 2022.
Host: Cheng Li
