K.-I. Nishikawa, B. Zhang, E. J. Choi, K. W. Min, J. Niemiec, M. Medvedev, P. Hardee, Y. Mizuno, A. Nordlund, J. Frederiksen, H. Sol, Martin Pohl, D. H. Hartmann, G.J. Fishman
- Recent PIC simulations of relativistic electron-positron (electron-ion) jets injected into a stationary medium show that particle acceleration occurs in the shocked regions. Simulations show that the Weibel instability is responsible for generating and amplifying highly nonuniform, small-scale magnetic fields and for particle acceleration. These magnetic fields contribute to the electron’s transverse eflection behind the shock. The “jitter” radiation from deflected electrons in turbulent magnetic fields has properties different from synchrotron radiation calculated in a uniform magnetic field. This jitter radiation may be important for understanding the complex time evolution and/or spectral structure of gamma-ray bursts, relativistic jets in general, and supernova remnants. In order to calculate radiation from first principles and go beyond the standard synchrotron model, we have used PIC simulations. We present synthetic spectra to compare with the spectra obtained from Fermi observations.
MetadatenAuthor details: | K.-I. Nishikawa, B. Zhang, E. J. Choi, K. W. Min, J. Niemiec, M. Medvedev, P. Hardee, Y. Mizuno, A. Nordlund, J. Frederiksen, H. Sol, Martin PohlORCiDGND, D. H. Hartmann, G.J. Fishman |
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URN: | urn:nbn:de:kobv:517-opus4-413128 |
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DOI: | https://doi.org/10.25932/publishup-41312 |
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ISSN: | 1866-8372 |
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Title of parent work (German): | Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe |
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Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (600) |
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Publication type: | Postprint |
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Language: | English |
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Date of first publication: | 2019/02/14 |
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Publication year: | 2012 |
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Publishing institution: | Universität Potsdam |
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Release date: | 2019/02/14 |
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Tag: | Weibel instability; magnetic field generation; particle acceleration; radiation; relativistic jets |
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Issue: | 600 |
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Number of pages: | 2 |
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First page: | 371 |
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Last Page: | 372 |
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Source: | roceedings of the International Astronomical Union 7 (2012) Symposium 279 (Death of Massive Stars: Supernovae and Gamma-Ray Bursts), pp. 371–372 DOI 10.3389/fpsyg.2015.00766 |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
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Peer review: | Referiert |
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Publishing method: | Open Access |
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Grantor: | Cambridge University Press (CUP) |
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License (German): | Keine öffentliche Lizenz: Unter Urheberrechtsschutz |
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