主讲人简介：

Prof. Renbin Yan （严人斌）obtained his BS degree from Peking University in 2001 and earned his PhD from University of California at Berkeley in 2007 under the guidance of Marc Davis. He then moved to the University of Toronto and was an Ontario Postdoctoral Fellow. In 2010, he became an Assistant Research Scientist at New York University. He got a tenure-track faculty position at the University of Kentucky in 2012 and was promoted to a tenured associate professor in 2018. Dr. Yan's research interests covers the interstellar medium, stellar population, active galactic nuclei, and astronomical instrumentation. He is the Survey Scientist for the SDSS-IV MaNGA survey and the PI of the MaStar stellar library project.

讲座内容简介：

星际介质是恒星形成和AGN的燃料，也是其反馈能量的汇聚地。它可以用元素丰度记录恒星形成的历史。暖离子化气体是ISM的主要组成部分，已经得到了广泛的研究。但是，在静止星系和静止区中，此类气体的电离机理仍然存在许多谜团。即使对于研究最深入的恒星形成区域，目前文献中仍存在大量关于其金属性，元素丰度模式和电离态的差异结果。我将介绍我们为解决这些奥秘和解决这些差异所做的工作和努力，描述一个迈向新时代的路线图，在这个新时代，能以精确宇宙学模式的准确性，模拟暖电离气体的天体物理学。我还将介绍一种经济高效的高光谱分辨率积分场光谱仪的设计。当与诸如远摄镜头或其阵列的小型望远镜配合使用时，它可以提供空前的数据，以帮助我们更好地了解恒星形成的HII区域和恒星形成的反馈。

Zoom link: https://zoom.com.cn/j/66924752068 code: 123456 

Abstract:

The intestellar medium is the fuel for star formation and AGN, and the sink for their feedback energy. It also records the history of star formation in its elemental abundances. The warm ionized gas is a major component of the ISM and has been extensively studied. However, there are still a number of mysteries about the ionization mechanisms for such gas in quiescent galaxies and quiescent regions of galaxies. Even for star-forming regions which are most well studied, there are still a large number of discrepant results in the literature about their metallicity, their elemental abundance pattern, and ionization states. I would present our efforts in solving these mysteries and resolving those discrepancies, and describe a roadmap towards an era in which we can model the astrophysics of warm ionized gas with precision, in the same style as Precision Cosmology. I will also introduce the design of a cost-effective, high spectral resolution, integral field spectrograph. When paired with a small telescope like a telephoto lens or arrays of it, it could provide unprecedented data to help us better understand star-forming HII regions and the feedback of star formation.