Tales from a multiphase Universe

Apr 19, 2023, 11:00 AM
15m
auditorium Eridanus (ESO)

auditorium Eridanus

ESO

Karl-Schwarzschild-Str. 2, Garching b. München.

Speaker

Max Gronke (MPA)

Description

Many astrophysical systems such as the interstellar, circumgalactic or intracluster media -- but also galactic winds, accretion disks or stellar coronae -- are multiphase, that is, colder gas phases are embedded in a larger, volume-filling hot phase. Such structure is hard to model and thus leads to usually unconverged large scale (e.g., cosmological) simulations. In spite of being present in such a variety of settings and scales, I will show in my talk that we can use a common theory to model the coupling between the phases -- inspired by the completely different field of turbulent combustion. This theory helps us understand incomplete observations (as we can often only observe one phase), fueling processes or convergence criteria for larger-scale simulations. Time provided, I will discuss how magnetic fields can suppress
mixing and cooling and thus potentially alter the previously described theory.

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