Cavitating Langmuir Turbulence in the Terrestrial Aurora
| Autor: | F. Forme, Michael T. Rietveld, B. Isham, T. Grydeland, Einar Mjølhus, Patrick Guio |
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| Přispěvatelé: | Interamerican University, EISCAT Scientific Association, Department of Physics and Astronomy [UCL London], University College of London [London] (UCL), Centre d'étude spatiale des rayonnements (CESR), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Dept. of Physics and Technology, Faculty of Science, University of Tromsø (UiT), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, University College of London [London] ( UCL ), Centre d'Etude Spatiale des Rayonnements, Université Paul Sabatier - Toulouse 3 ( UPS ), University of Tromsø ( UiT ) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Langmuir
010504 meteorology & atmospheric sciences Langmuir Turbulence General Physics and Astronomy FOS: Physical sciences Electron Atmospheric sciences Plasma oscillation 01 natural sciences Physics::Fluid Dynamics Physics - Space Physics Physics::Plasma Physics 0103 physical sciences 010306 general physics 0105 earth and related environmental sciences Physics Turbulence Plasma Space Physics Physics::Classical Physics Space Physics (physics.space-ph) [PHYS.PHYS.PHYS-SPACE-PH]Physics [physics]/Physics [physics]/Space Physics [physics.space-ph] Computational physics [ PHYS.PHYS.PHYS-SPACE-PH ] Physics [physics]/Physics [physics]/Space Physics [physics.space-ph] Physics::Space Physics Astrophysical plasma Ionosphere |
| Zdroj: | Physical Review Letters Physical Review Letters, 2012, 108, pp.105003. ⟨10.1103/PhysRevLett.108.105003⟩ Physical Review Letters, American Physical Society, 2012, 108, pp.105003. ⟨10.1103/PhysRevLett.108.105003⟩ Physical Review Letters, American Physical Society, 2012, 108, pp.105003. 〈10.1103/PhysRevLett.108.105003〉 |
| ISSN: | 0031-9007 1079-7114 |
| Popis: | Langmuir cavitons have been artificially produced in the earth's ionosphere, but evidence of naturally-occurring cavitation has been elusive. By measuring and modeling the spectra of electrostatic plasma modes, we show that natural cavitating, or strong, Langmuir turbulence does occur in the ionosphere, via a process in which a beam of auroral electrons drives Langmuir waves, which in turn produce cascading Langmuir and ion-acoustic excitations and cavitating Langmuir turbulence. The data presented here are the first direct evidence of cavitating Langmuir turbulence occurring naturally in any space or astrophysical plasma. Comment: 4 pages, 4 figures, published in PRL on 9 March 2012 http://link.aps.org/doi/10.1103/PhysRevLett.108.105003 |
| Databáze: | OpenAIRE |
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