Shanghai Astronomical Observatory Astrophysics Colloquium

Title：Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays

Location：Lecture Hall, 3rd floor

Time：3:00 pm Oct. 27th (Thursday)

Speaker：Prof. Suoqing Ji（Shanghai Astronomical Observatory, CAS）

Abstract：

Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which extends up to a few times of galactic virial radius. In addition, warm gas at a few 10^5 K is found to be tightly associated with the star-forming galaxies, but not the quenched ones. However, the origin and fate of such multiphase gas still remain unclear. In this talk, I will discuss how magnetic fields, turbulent mixing layers and cosmic rays can play a crucial role in the formation and stability of the multiphase CGM, and in the ecosystem of galaxy evolution.

CV：

Dr. Suoqing Ji obtained his Ph.D. in physics from the University of California Santa Barbara in 2018. Before he joined the Shanghai Astronomical Observatory as a faculty in 2021, he was a Sherman Fairchild fellow in theoretical astrophysics at Caltech from 2018 to 2021. His research interests include magnetohydrodynamics, turbulence, hydrodynamic and thermal instabilities, cosmic rays, etc., and their application in galaxy formation, the circumgalactic medium and stellar physics.

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