Berlin 2014 – wissenschaftliches Programm
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SYPA: Symposium Plasma-Astrophysik
SYPA 1: Plasma Astrophysics
SYPA 1.5: Hauptvortrag
Donnerstag, 20. März 2014, 16:30–17:00, SPA Kapelle
Physical Processes in the Turbulent Interstellar Medium — •Dieter Breitschwerdt1, Miguel de Avillez2, Michael Schulreich1, Jenny Feige3, and Christian Dettbarn4 — 1Department of Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 2Department of Mathematics, University of Évora, R. Romão Ramalho 59, 7000 Évora, Portugal — 3Institute for Isotopic Research, University of Vienna, Währingerstr. 17, A-1090 Vienna, Austria — 4ZAH, University of Heidelberg, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
The interstellar medium (ISM) in star forming galaxies is a highly dynamical system, whose physical and chemical state is heavily determined by supersonic turbulence and non-linear feedback. To follow its evolution over an appreciable amount of time requires 3D high resolution numerical simulations on massive parallel processors. We will show movies and results from our investigations, spanning more than a decade. These include: (i) volume filling factors of the ISM both from hydro- and magnetohydrodynamical simulations, (ii) pdfs, which are lognormal, due to the coupling of scales by turbulence, (iii) time-dependent cooling and non-equilibrium ionization effects of the interstellar plasma, covering a large range in temperature, (iv) turbulent mixing of isotopes like 60Fe, resulting from supernova explosions of a nearby moving stellar group in the local ISM; this will be compared to recent accelerator mass spectroscopy data from samples of the deep sea ferromanganese crust and sediments.