München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.78: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Electron-Ion Temperature Ratio in Collisionless Shocks — •Adrian Hanusch1, Tatyana Liseykina1, and Mikhail Malkov21Institut für Physik, Universität Rostock, 18051 Rostock, Germany — 2CASS and Department of Physics, University of California, San Diego, La Jolla, California 92093, USA

Collisionless shocks are ubiquitous in astrophysical environments and are proven to be efficient particle accelerators. Since the shock transition occurs on a length scale much smaller than the particle collisional mean free path, an equilibration between ion and electron temperatures might not occur immediately. Observations of Balmer dominated shocks have shown a trend of smaller electron temperatures with a dependence of the electron-ion temperature ratio on the shock velocity [1]. We use hybrid modeling of collisionless shocks to investigate the thermalization of test-particle electron population in the proton driven turbulence. The results of our simulations compare well with the observational data and earlier theoretical predictions [2].

[1] P. Ghavamian et al., Space Sci. Rev., 178, (2013)

[2] J. Vink et al., Astron. Astrophys. 579, (2015)

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