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@INPROCEEDINGS{Wittor:874408,
author = {Wittor, Denis and Domínguez-Fernández, Paola and Vazza,
Franco and Brüggen, Marcus},
title = {{A} {S}ong of {S}hocks and {D}ynamo: {N}umerical {S}tudies
of a {G}alaxy {C}luster {M}erger in the {HIMAG} {P}roject},
volume = {50},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2020-01418},
series = {Publication Series of the John von Neumann Institute for
Computing (NIC) NIC Series},
pages = {123 - 132},
year = {2020},
comment = {NIC Symposium 2020},
booktitle = {NIC Symposium 2020},
abstract = {With ENZO simulations run on the Jülich supercomputers, we
have investigated the evolution of magnetic fields in the
largest cosmic structures (namely galaxy clusters and
filaments connecting them) with unprecedented dynamical
range. These simulations revealed the full development of
the small-scale dynamo in Eulerian cosmological
magneto-hydrodynamical simulations. The turbulent motions
developed during the formation of clusters are energetic
enough to foster the growth of magnetic fields by several
orders of magnitude, starting from weak magnetic fields up
to strengths of ~ $\mu$G as observed. Furthermore, shock
waves are launched during cluster formation and they are
able to accelerate cosmic-ray electrons, that emit in the
radio wavelengths. Radio observations of this emission
provide information on the local magnetic field strength. We
have incorporated, for the first time, the cooling of
cosmic-ray electrons when modelling this emission. In this
contribution, we present our advances in modelling these
physical processes. Here, we mostly focus on the most
interesting object in our sample of galaxy clusters, which
shows the complexity of magnetic fields and the potential of
existing and future multi-wavelengths observations in the
study of the weakly collisional plasma on ~ Megaparsecs
scales.},
month = {Feb},
date = {2020-02-27},
organization = {NIC Symposium 2020, Jülich (Germany),
27 Feb 2020 - 28 Feb 2020},
cin = {NIC},
cid = {I:(DE-Juel1)NIC-20090406},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
url = {https://juser.fz-juelich.de/record/874408},
}