11-15 May 2020
Leibniz Institute for Astrophysics Potsdam (AIP)
Europe/Berlin timezone

Modelling microphysics in MHD: ambipolar diffusion, chemistry, and cosmic rays

13 May 2020, 16:20
Lecture Hall (Leibniz Institute for Astrophysics Potsdam (AIP))

Lecture Hall

Leibniz Institute for Astrophysics Potsdam (AIP)

An der Sternwarte 16 14482 Potsdam, Germany
Oral presentation Main conference Disk Microphysics and Ionization


Dr Tommaso Grassi (USM/LMU)


From molecular clouds to protoplanetary disks, non-ideal magnetic effects are important in many astrophysical environments. Indeed, in star and disk formation processes, it has become clear that these effects are critical to the evolution of the system. The efficacy of non-ideal effects are, however, determined by the complex interplay between magnetic fields, ionising radiation, cosmic rays, microphysics, and chemistry. In order to understand these key microphysical parameters, we present a one-dimensional non-ideal magnetohydrodynamics code and apply it to a model of a time-dependent, oblique, magnetic shock wave. By varying the microphysical ingredients of the model, we find that cosmic rays and dust play a major role, and that, despite the uncertainties, the inclusion of microphysics is essential to obtain a realistic outcome in magnetic astrophysical simulations.

Primary author

Dr Tommaso Grassi (USM/LMU)


Dr Marco Padovani (INAF Arcetri) Jon Ramsey (Virginia Initiative on Cosmic Origins, Department of Astronomy, University of Virginia) Dr Daniele Galli (INAF Arcetri) Dr Neil Vaytet (European Spallation Source ERIC) Prof. Barbara Ercolano (USM/LMU, Munich) Prof. Troels Haugbølle (NBI)

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