Report/Journal Article

PUBDB-2017-12238

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Microscopic Processes in Global Relativistic Jets Containing Helical Magnetic Fields: Dependence on Jet Radius

Nishikawa, K.-I. (Corresponding author) ; Mizuno, Y. (Corresponding author) ; Gómez, J. (Corresponding author) ; Duţan, I. (Corresponding author) ; Meli, A. (Corresponding author) ; White, C. (Corresponding author) ; Niemiec, J. (Corresponding author)Extern* ; Kobzar, O. (Corresponding author) ; Pohl, M. (Corresponding author)DESY* ; Pe’er, A. (Corresponding author) ; Frederiksen, J. (Corresponding author) ; Nordlund, Å. (Corresponding author) ; Sol, H. (Corresponding author) ; Hardee, P. (Corresponding author) ; Hartmann, D. (Corresponding author)

2017
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/galaxies5040058  doi:10.3204/PUBDB-2017-12238

Report No.: arXiv:1708.07740

Abstract: In this study, we investigate the interaction of jets with their environment at a microscopic level, which is a key open question in the study of relativistic jets. Using small simulation systems during past research, we initially studied the evolution of both electron–proton and electron–positron relativistic jets containing helical magnetic fields, by focusing on their interactions with an ambient plasma. Here, using larger jet radii, we have performed simulations of global jets containing helical magnetic fields in order to examine how helical magnetic fields affect kinetic instabilities, such as the Weibel instability, the kinetic Kelvin–Helmholtz instability (kKHI) and the mushroom instability (MI). We found that the evolution of global jets strongly depends on the size of the jet radius. For example, phase bunching of jet electrons, in particular in the electron–proton jet, is mixed with a larger jet radius as a result of the more complicated structures of magnetic fields with excited kinetic instabilities. In our simulation, these kinetic instabilities led to new types of instabilities in global jets. In the electron–proton jet simulation, a modified recollimation occurred, and jet electrons were strongly perturbed. In the electron–positron jet simulation, mixed kinetic instabilities occurred early, followed by a turbulence-like structure. Simulations using much larger (and longer) systems are required in order to further thoroughly investigate the evolution of global jets containing helical magnetic fields.

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2017

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Database coverage:
; ; ; DOAJ Seal ; Emerging Sources Citation Index ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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