Ken-Ichi Nishikawa, Yosuke Mizuno, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Jose L. Gomez, Ioana Dutan, Jacob Trier Frederiksen, Ake Nordlund, Athina Meli, Helene Sol, Philip E. Hardee, Dieter H. Hartmann
- In the study of relativistic jets one of the key open questions is their interaction with the environment on the microscopic level. Here, we study the initial evolution of both electron-proton (e(-)-p(+)) and electron-positron (e(+/-)) relativistic jets containing helical magnetic fields, focusing on their interaction with an ambient plasma. 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). In our initial simulation study these kinetic instabilities are suppressed and new types of instabilities can grow. In the e(-)-p(+) jet simulation a recollimation-like instability occurs and jet electrons are strongly perturbed. In the e(+/-) jet simulation a recollimation-like instability occurs at early times followed by a kinetic instability and the general structure is similar to a simulation without helical magnetic field.In the study of relativistic jets one of the key open questions is their interaction with the environment on the microscopic level. Here, we study the initial evolution of both electron-proton (e(-)-p(+)) and electron-positron (e(+/-)) relativistic jets containing helical magnetic fields, focusing on their interaction with an ambient plasma. 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). In our initial simulation study these kinetic instabilities are suppressed and new types of instabilities can grow. In the e(-)-p(+) jet simulation a recollimation-like instability occurs and jet electrons are strongly perturbed. In the e(+/-) jet simulation a recollimation-like instability occurs at early times followed by a kinetic instability and the general structure is similar to a simulation without helical magnetic field. Simulations using much larger systems are required in order to thoroughly follow the evolution of global jets containing helical magnetic fields.…
MetadatenAuthor details: | Ken-Ichi Nishikawa, Yosuke Mizuno, Jacek Niemiec, Oleh KobzarORCiD, Martin PohlORCiDGND, Jose L. Gomez, Ioana Dutan, Jacob Trier Frederiksen, Ake Nordlund, Athina Meli, Helene Sol, Philip E. Hardee, Dieter H. Hartmann |
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DOI: | https://doi.org/10.3390/galaxies4040038 |
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ISSN: | 2075-4434 |
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Title of parent work (English): | Galaxies : open access journal |
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Publisher: | MDPI |
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Place of publishing: | Basel |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2016 |
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Publication year: | 2016 |
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Release date: | 2020/03/22 |
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Tag: | global jets; helical magnetic fields; kinetic instabilities; kink instability; particle-in-cell simulations; relativistic jets |
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Volume: | 4 |
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Number of pages: | 9 |
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Funding institution: | NSF [AST-0908010, AST-0908040, NASA-NNX09AD16G, NNX12AH06G, NNX13AP-21G, NNX13AP14G]; Narodowe Centrum Nauki [DEC-2013/10/E/ST9/00662]; ERC [610058]; 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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