学术报告—DESI&CSST Era For Galaxy Evolution

ABSTRACT

The galaxy is surrounded by the large amouts of gas in the outskirt, which is known as the circumgalactic medium (CGM). The CGM, as the bridge connecting the central galaxy and the large-scale environment, is playing an important role in a galaxy evolution. DESI is already starting its 5-year survey, which will ultimately collect more than 30 million spectra. It will greatly deepen our understanding of the Universe, the cosmology, the galaxy evolution and all other astronomical sciences. CSST is an image survey covering > 17000 square degrees. The combination of the image and spectra will broaden the constraint on the galaxy evolution. In this talk, I will present the detection of the CGM via emission lines using SDSS spectra, and will also present how DESI is going to deepen the study of the CGM. I will also introduce the dwarf galaxy search using both CSST and DESI, to constrain the galaxy evolution from the low mass end. 

BIO

Prof. Huanian Zhang’s main research interest is on the galaxy formation and evolution, specifically on studying the circumgalactic medium and the low mass systems to broaden our understanding of the galaxy evolution. Prof. Zhang got his bachelor from Shandong University in 2011 and the PhD from the University of Arizona in Physics in 2016. After that, he moved to the Steward Observatory as a postdoc fellow until 2021. In September 2021, Prof. Zhang joined HUST as an associate professor.