Probing cosmic reionization using high-redshift quasars and galaxies 利用高红移星系和类星体探测宇宙再电离

Cosmic reionization marks the latest phase transition of the IGM in the early Universe. High-redshift (redshift around 6 or higher) quasars and galaxies are powerful tools to probe this epoch. I will review how the absorption spectra of quasars and the statistical properties of galaxies (particularly Lyman-alpha emitting galaxies) are used to estimate the IGM state during the reionization epoch. Then I will explain the important energy source problem, i.e., what astrophysical sources provided ionizing photons for reionization. In the end I will briefly mention what future facilities may help us better understand the reionization.

Linhua Jiang (PKU)
Join Zoom Meeting Meeting ID: 840 1995 2918 Passcode: 733052
Ran Wang
Thursday, December 8, 2022 - 3:30PM to Thursday, December 8, 2022 - 4:30PM
Linhua Jiang is a faculty member at the Department of Astronomy and the Kavli Institute at Peking University. He obtained his B.S. and M.S. degrees from Peking University, and then obtained his Ph.D. degree from University of Arizona in 2008. He joined Peking University in 2014. Professor Jiang has a broad range of research interests in extragalactic astronomy, including high-redshift quasars and supermassive black holes, high-redshift galaxies and galaxy clusters, and their implications to cosmic reionization.