Physics Seminar: Active Galactic Nuclei

Thursday, February 7, 2019 The event started -105 days ago

10:50 AM11:50 AM

Optics Building

Room #234 - 237

The Microphysics of AGN Feedback

Dr. Karen Yang (University of Maryland)

Feedback from active galactic nuclei (AGN) is one of the most important processes governing the formation and evolution of galaxies and galaxy clusters. It is believed to be responsible for inhibiting the formation of massive galaxies and for solving the long-standing "cooling-flow problem" in galaxy clusters. A lot of understanding of AGN feedback has been gained using hydrodynamic simulations; however, some of the relevant physical processes are unresolvable or not captured by pure hydrodynamics, such as plasma effects and cosmic-ray (CR) physics. In this talk, I will present how we use simulations that incorporate this "microphysics" to understand how AGN jets feedback on galactic and cluster scales. Specifically, I will discuss our recent progress on the understanding of AGN heating in clusters, and how the heating processes depends on the AGN jet composition. I will also talk about how we could use multi-messenger observations of the Fermi bubbles as a nearby laboratory for studying AGN feedback. Finally, I will conclude with open questions and future prospects of applying simulations beyond hydrodynamics to various interesting astrophysical systems.


College of Science, Physics and Astronomy
Public, Students, Faculty and Staff, Alumni


Ming Sun This email address is being protected from spambots. You need JavaScript enabled to view it.


Optics Building

John Wright Blvd.Huntsville, AL 35899

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