Theoretical and simulation studies of relativistic ion holes in astrophysical plasmas

B Eliasson, P K Shukla, M E Dieckmann

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Theoretical and numerical studies of relativistic ion holes in a relativistically hot electron–ion plasma are presented. Previous particle-in-cell (PIC) simulations have shown that the ion holes are formed as a result of relativistic beam-plasma instabilities in the foreshock region of internal shocks of gamma-ray bursts and the relativistic jets of active galactic nuclei. In this process, the electrons are heated to ultra-relativistic temperatures so that their relativistic mass becomes comparable to the proton mass, and relativistic ion holes are formed by a secondary ion beam instability. The electrostatic potentials associated with the ion holes are large enough to accelerate particles to GeV energies. We use a semi-analytical model to construct relativistic ion holes and investigate their stability by means of fully relativistic Vlasov simulations. This investigation is relevant for astrophysical settings where the ion holes may work as efficient particle accelerators.
Original languageEnglish
Article number55
Number of pages13
JournalNew Journal of Physics
Volume8
Issue number4
DOIs
Publication statusPublished - 18 Apr 2006

Fingerprint

astrophysics
ions
simulation
particle accelerators
magnetohydrodynamic stability
high temperature plasmas
gamma ray bursts
active galactic nuclei
shock
ion beams
electrostatics
protons
cells
electrons
temperature
energy

Keywords

  • ion holes
  • relativistic plasma
  • particle in cell simulations

Cite this

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abstract = "Theoretical and numerical studies of relativistic ion holes in a relativistically hot electron–ion plasma are presented. Previous particle-in-cell (PIC) simulations have shown that the ion holes are formed as a result of relativistic beam-plasma instabilities in the foreshock region of internal shocks of gamma-ray bursts and the relativistic jets of active galactic nuclei. In this process, the electrons are heated to ultra-relativistic temperatures so that their relativistic mass becomes comparable to the proton mass, and relativistic ion holes are formed by a secondary ion beam instability. The electrostatic potentials associated with the ion holes are large enough to accelerate particles to GeV energies. We use a semi-analytical model to construct relativistic ion holes and investigate their stability by means of fully relativistic Vlasov simulations. This investigation is relevant for astrophysical settings where the ion holes may work as efficient particle accelerators.",
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Theoretical and simulation studies of relativistic ion holes in astrophysical plasmas. / Eliasson, B; Shukla, P K; Dieckmann, M E.

In: New Journal of Physics, Vol. 8, No. 4, 55, 18.04.2006.

Research output: Contribution to journalArticle

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AU - Shukla, P K

AU - Dieckmann, M E

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AB - Theoretical and numerical studies of relativistic ion holes in a relativistically hot electron–ion plasma are presented. Previous particle-in-cell (PIC) simulations have shown that the ion holes are formed as a result of relativistic beam-plasma instabilities in the foreshock region of internal shocks of gamma-ray bursts and the relativistic jets of active galactic nuclei. In this process, the electrons are heated to ultra-relativistic temperatures so that their relativistic mass becomes comparable to the proton mass, and relativistic ion holes are formed by a secondary ion beam instability. The electrostatic potentials associated with the ion holes are large enough to accelerate particles to GeV energies. We use a semi-analytical model to construct relativistic ion holes and investigate their stability by means of fully relativistic Vlasov simulations. This investigation is relevant for astrophysical settings where the ion holes may work as efficient particle accelerators.

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