Changseok Kim: Temporal and Spatial Constraints on AGN Feedback via Gas Outflows

Tuesday, 28 May 2024 5 p.m. — 6 p.m. MST

Gemini North Hilo Base Facility | 670 N A’ohoku Place Hilo, Hawaii, 96720, USA

Gemini North Talks
Changseok Kim (Seoul National University)

Feedback by active galactic nuclei (AGNs) has been an essential ingredient in galaxy evolution models to regulate the growth of galaxies, yet its role and mechanism are still not well constrained by observations. Among various physical phenomena from AGN, gas outflows are often suggested as a primary channel of AGN feedback. In this talk, I will introduce my research topics, aiming at temporal and spatial constraints on the role of AGN feedback through gas outflows. First, I will briefly summarize the star formation rate estimates for local AGN host galaxies based on SED fitting with JCMT/SCUBA-2 data. I will discuss positive correlations between AGN and star formation activity, suggesting no sign of instantaneous AGN feedback. Second, I will show spatially resolved characteristics of AGN-driven outflows based on our Gemini/GMOS-IFU survey. In particular, I will highlight the kinematic outflow size, outflow size - [OIII] luminosity relation, and its spatial constraint on the AGN feedback effect. Furthermore, I will present preliminary results from 3D biconical outflow models and their implications for the physical properties of the AGN-driven outflows. Finally, I will introduce my ongoing project on AGN feedback in post-starburst AGNs, exhibiting recently quenched stellar population and AGN activity simultaneously. I will outline the observational plan and current status of the project, highlighting the role of Gemini telescopes.

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