The Galaxy-Halo Connection with the Observation of Neutral Hydrogen

主讲人 (Speaker): 
郭宏 研究员
主讲人单位 (Speaker's Institute): 
上海天文台 (SHAO)
邀请人 (Invited by): 
黄志琦 (Zhiqi Huang)
时间 (Time): 
星期四, 2017/04/27 - 10:30 to 11:30
地点 (Location): 
海滨红楼17栋107会议室
摘要 (Abstract): 

I’ll introduce the methods of connecting the observed galaxies to the dark matter in the universe from the spatial distribution of galaxies. Traditionally, people have made great progress by relating the galaxy properties, such as luminosity, stellar mass and color to the dark matter halo properties, using all these galaxy-halo connection methods. An important element in the galaxy formation and evolution is the cold gas. Its relation to the dark matter halos is, however, less studied due to the lack of enough observations in the past decade. In our recent work, we have measured and modeled the relation between the neutral hydrogen component of the galaxies and the dark matter halo. We find that the cold gas can potentially put strong constraints on the galaxy formation and evolution models. With the upcoming neutral hydrogen surveys, e.g. ASKAP, FAST and SKA, we will be able to understand more about galaxy formation.

 

主讲人简介 (Speaker's CV): 
郭宏,1984年生,博士生导师,上海天文台“星系和宇宙学研究中心”研究员,“星系分布与演化”课题组组长。2005年于北京大学获理学学士,2010年于上海天文台获理学博士学位。之后于2011年至2012年在美国凯斯西储大学从事博士后工作。2013年至2015年于美国犹他大学开展博士后工作。2015年回国工作,并入选中科院“百人计划”。主要研究方向为宇宙学大尺度结构、星系与暗物质关联、星系形成模型等。