邀请人 (Invited by): 黄志琦

时间 (Time): 星期四，2023/04/6-14:30-16:00

地点 (Location): 珠海校区天琴中心3416会议室

摘要 (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. 

主讲人简介 (Speaker's CV): 

张华年，华中科技大学副教授。主要研究领域是星系的形成与演化，特别是对星系周介质和低质量系统的研究，加深了人们对星系演化的理解。2011年获得山东大学学士学位，2016年获得亚利桑那大学物理学博士学位。在那之后，他以博士后研究员的身份在亚利桑那大学Steward Observatory从事天文研究工作，2021.09加入华中科技大学天文系。