【学术报告】
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报告题目：Gas flow patterns in barred galaxies and a potential mechanism to seed massive black holes

报告人：Juntai Shen 沈俊太 研究员

报告人单位： Shanghai Astronomical Observatory 上海天文台

报告时间：2018年4月2日（星期一）下午 3:00-4:00

报告地点：新主楼427会议室

报告语言：英文

报告摘要： 

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Nuclear rings are common features in the inner region of barred galaxies, with their shapes and properties linked to the physical parameters of the galaxies. We use high-resolution hydrodynamical simulations to study gas inflow patterns in barred galaxies, with special attention to the nuclear rings. The location and thickness of nuclear rings are tightly correlated with galactic properties, such as the bar pattern speed and bulge central density. We elaborate the formation mechanism of nuclear rings, and propose a new simple method to estimate the bar pattern speed for barred galaxies possessing such a ring. We also attempt to reproduce and understand the gas features present in the barred Milky Way. In addition, we demonstrate that a bar may provide a self-limiting rapid growth mechanism of massive black holes. The result may have important implications on the seeding of massive black holes in the very high-redshift quasars, and forming massive black holes in disk galaxies without a significant classical bulge.

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云台邀请团组：大样本恒星演化组 /中国科学院天体结构与演化重点实验室

邀请方联系人：韩占文

3月27日