Li Ji, Purple Mountain Observatory, CAS, Nanjing, China — July 14, 2026

Abstract: Mapping the circumgalactic medium (CGM) in emission is one of the important scientific goals for astronomers to either use the modern ground-based telescopes or the future space missions. CGMs are multi-phases, key to understand the galaxy ecosystem and its accretion and feedback. In this talk, I will introduce a few scientific projects in our group for the efforts in understanding the mechanims of the hot diffuse emission in nearby universe with high spectral resolution X-ray data. In addition, I will introduce the prospective UV and X-ray mission in the near future in China.

Bio: Prof. Li Ji is a chief scientist of Ultraviolet and X-ray astronomy group in Purple Mountain Observatory since 2017. She received B.A. and M.A. in Astronomy from Nanjing University in China and obtained a Ph.D. in Astrophysics from University of Massachusetts at Amherst, USA in 2006. She was a postdoc in MIT Kavli institution for Astrophysics and Space Research from 2006-2010, and a visiting scientist position in Smithonian Astrophysical Observatory for half a year before she fully settled down as a full-time faculty member in Purple Mountain Observatory, CAS in China in 2011. She experts in the line diagnostics for the high-resolution spectra. Her research covers a broad range of UV/X-ray fields for the diffuse emissions from the small scale to the larger scale. In recent years, she has devoted herself to the investigation of the technologies and science for mapping Lyman UV emission of diffuse sources.