4-8 October 2015
Hans Harnack Haus
Europe/Berlin timezone
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Contribution Contributed Talk

Hans Harnack Haus -

Molecular cloud formation and dust particle evolution in SILCC simulations


  • Dr. Thomas PETERS

Primary authors


The SILCC project (SImulating the Life-Cycle of molecular Clouds, Walch et al. arXiv:1412.2749; http://hera.ph1.uni-koeln.de/~silcc/) aims at a more self-consistent understanding of the interstellar medium on small scales and its link to galaxy evolution. We simulate the evolution of the multi-phase ISM in a 500 pc x 500 pc x 10 kpc region of a galactic disc, with a gas surface density of $\Sigma_\rm{gas} = 10 M_\rm{sol}/pc^2$. The Flash 4.1 simulations currently include an external potential, self-gravity, magnetic fields, heating and radiative cooling, time-dependent chemistry of H$_2$ and CO considering (self-) shielding, and supernova feedback. After summarising the main results of our first generation of simulations and giving an outlook on the latest simulations with additional physics (cosmic ray transport and stellar winds), I will focus on two projects that aim at getting a better understanding of molecular cloud structure (chemical and dynamical): 1) High-resolution simulations of molecular cloud formation out of the diffuse interstellar medium that can be compared with, e.g., observations obtained by the THOR project and 2) Simulations of the Lagrangian evolution of dust particles within the multi-phase ISM, with the long-term aim of producing simulations with a live model of dust properties and opacities that feed back to the chemical and thermodynamical evolution during cloud formation.