【直播】【上海天文台天体物理学术报告】Prof. Max Gronke (MPA)

直播信息

报告题目

Multiphase, turbulent gas dynamics

报告人（单位）

Prof. Max Gronke（Max Plank Institute for Astrophysics）

报告时间

2022年4月28日（周四）15:00

主办方

中科院上海天文台

直播二维码

报告人介绍

Prof. Max Gronke is a group leader at the Max Plank Institute for Astrophysics (MPA). He obtained his PhD from Oslo University in 2017. Before he joined MPA in 2021, Prof. Gronke is a postdoc and Hubble fellow at University of California Santa Barbara and the Johns Hopkins University. Prof. Gronke is an expert on multiple dynamics, radiative transfer and computational astrophysics.

报告摘要

Astrophysical systems, such as the interstellar, intracluster, or the circumgalactic medium, are usually multiphase with a colder phase embedded in a volume filling hot environment. Although ubiquitous, multiphase gas is notoriously hard to model which leads to often unconverged cold gas properties in large scale (cosmological) simulations. In such (turbulent) systems, hydrodynamical instabilities can destroy the cold gas on a short timescale. However, this mixing also leads to intermediate temperature gas which can radiatively cool and (re)form cold gas. In this talk, I want to discuss under which conditions the cold gas can survive in a turbulent medium, and what sets the mass transfer between the phases. I will show that the survival criterion sets a characteristic scale of cold gas but the dynamics and growth will lead to a scale-free mass distribution. I will discuss implications for observations, and convergence criteria for large scale simulations.

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