astrolunch: Christophe Pichon

Tue, 23/02/2021 12:30 to 13:30
Title: Order out of chaos: the emergence of homeostatic thin galactic discs.
Abstract: I this talk I will argue that thin galactic disks are emerging structures of hierarchical clustering when secular processes take over. The appearance of such improbable structure is paradoxically made possible by shocks, feedback and turbulence within the disc. These processes radiates entropy, while gravitational wakes tighten a self-regulating loop towards marginal stability,  pumping free (rotational) energy from the circumgalactic medium.  This connection allows us to  relate disc evolution to the dynamics of the cosmic web

Zoom link
Meeting ID: 847 4056 5269
Passcode: w31c0m3