Ken-Ichi Nishikawa, P. E. Hardee, I. Dutan, J. Niemiec, M. Medvedev, Y. Mizuno, A. Meli, H. Sol, B. Zhang, Martin Pohl, D. H. Hartmann
- We have investigated magnetic field generation in velocity shears via the kinetic Kelvin-Helmholtz instability (kKHI) using a relativistic plasma jet core and stationary plasma sheath. Our three-dimensional particle-in-cell simulations consider plasma jet cores with Lorentz factors of 1.5, 5, and 15 for both electron-proton and electron-positron plasmas. For electron-proton plasmas, we find generation of strong large-scale DC currents and magnetic fields that extend over the entire shear surface and reach thicknesses of a few tens of electron skin depths. For electron-positron plasmas, we find generation of alternating currents and magnetic fields. Jet and sheath plasmas are accelerated across the shear surface in the strong magnetic fields generated by the kKHI. The mixing of jet and sheath plasmas generates a transverse structure similar to that produced by the Weibel instability.
MetadatenAuthor details: | Ken-Ichi Nishikawa, P. E. Hardee, I. Dutan, J. Niemiec, M. Medvedev, Y. Mizuno, A. Meli, H. Sol, B. Zhang, Martin PohlORCiDGND, D. H. Hartmann |
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DOI: | https://doi.org/10.1088/0004-637X/793/1/60 |
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ISSN: | 0004-637X |
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ISSN: | 1538-4357 |
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Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics |
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Publisher: | IOP Publ. Ltd. |
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Place of publishing: | Bristol |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2014 |
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Publication year: | 2014 |
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Release date: | 2017/03/27 |
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Tag: | acceleration of particles; magnetic fields; plasmas; radiation mechanisms: non-thermal; relativistic processes; stars: jets |
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Volume: | 793 |
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Issue: | 1 |
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Number of pages: | 16 |
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Funding institution: | NSF [AST-0908010, AST-0908040, NASA-NNG05GK73G, NNX07AJ88G, NNX08AG83G,
NNX08AL39G, NNX09AD16G, NNX12AH06G, NNX13AP-21G, NNX13AP14G]; Polish
National Science Centre [DEC-2011/01/B/ST9/03183,
DEC-2012/04/A/ST9/00083]; Ministry of Science and Technology of Taiwan
[NSC 100-2112-M-007-022-MY3, MOST 103-2112-M-007-023-MY3]; Deutsche
Forschungsgemeinschaft [PO 1508/1-2]; National Science Foundation
[PHY05-51164] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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Peer review: | Referiert |
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