Published March 2018
| Version v1
Journal article
Tracking of an electron beam through the solar corona with LOFAR
- Creators
- Mann, G.
- Breitling, F.
- Vocks, C.
- Aurass, H.
- Steinmetz, M.
- Strassmeier, G.
- Bisi, M.
- Fallows, R.
- Gallagher, P.
- Kerdraon, A.
- Mackinnon, A.
- Magdalenic, J.
- Rucker, H.
- Anderson, J.
- Asgekar, A.
- Avruch, M.
- Bell, M.
- Bentum, J.
- Bernardi, G.
- Best, P.
- Bîrzan, L.
- Bonafede, A.
- Broderick, J.
- Brüggen, M.
- Butcher, R.
- Ciardi, B.
- Corstanje, A.
- Gasperin, F. De
- Geus, E.
- Deller, A.
- Duscha, S.
- Eislöffel, J.
- Engels, D.
- Falcke, H.
- Fender, R.
- Ferrari, C.
- Frieswijk, W.
- Garrett, M.
- Griessmeier, Jean-Mathias
- Gunst, A.
- Haarlem, M.
- Hassall, E.
- Heald, G.
- T. Hessels, J.
- Hoeft, M.
- Horandel, J.
- Horneffer, A.
- Juette, E.
- Karastergiou, A.
- A. Klijn, A.
- Kondratiev, V.
- Kramer, M.
- Kuniyoshi, M.
- Kuper, G.
- Maat, P.
- Markoff, S.
- Mcfadden, R.
- Mckay-Bukowski, D.
- Mckean, J.
- Mulcahy, D.
- Munk, H.
- Nelles, A.
- Norden, J.
- Orru, E.
- Paas, H.
- Pandey, M.
- Pandey, V.
- Pizzo, R.
- Polatidis, A.
- Rafferty, D.
- Reich, W.
- Röttgering, H.
- M. Scaife, M.
- Schwarz, J.
- Serylak, M.
- Sluman, J.
- Smirnov, O.
- Stappers, B.
- Tagger, Michel
- Tang, Y.
- Tasse, C.
- Veen, S.
- Thoudam, S.
- Toribio, M.
- Vermeulen, R.
- Weeren, J.
- Wise, M.
- Wucknitz, O.
- Yatawatta, S.
- Zarka, P.
- Zensus, J.
- Others:
- Leibniz-Institut für Astrophysik Potsdam (AIP)
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH / Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures (DSMZ)
- STFC Rutherford Appleton Laboratory (RAL) ; Science and Technology Facilities Council (STFC)
- Institute of Mathematical and Physical Sciences ; Institute of Mathematical and Physical Sciences
- Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Lawrence Livermore National Laboratory (LLNL)
- Solar-Terrestrial Center of Excellence, Royal Observatory of Belgium
- Space Research Institute of Austrian Academy of Sciences (IWF) ; Austrian Academy of Sciences (OeAW)
- Max-Planck-Institut für Radioastronomie (MPIFR)
- Netherlands Institute for Radio Astronomy ( ASTRON )
- Kapteyn Astronomical Institute [Groningen] ; University of Groningen [Groningen]
- CSIRO Astronomy and Space Science ; Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO)
- Harvard-Smithsonian Center for Astrophysics (CfA) ; Harvard University [Cambridge]-Smithsonian Institution
- University of Edinburgh
- Leiden Observatory [Leiden] ; Universiteit Leiden [Leiden]
- Jacobs University [Bremen]
- School of Physics and Astronomy [Southampton] ; University of Southampton
- Universität Hamburg (UHH)
- Max-Planck-Institut für Astrophysik (MPA) ; Max-Planck-Gesellschaft
- Radboud University [Nijmegen]
- Netherlands Institute for Radio Astronomy (ASTRON)
- Thüringer Landessternwarte Tautenburg (TLS)
- Hamburger Sternwarte/Hamburg Observatory ; Universität Hamburg (UHH)
- Institute for Mathematics, Astrophysics and Particle Physics (IMAPP) ; Radboud University [Nijmegen]
- Oxford Astrophysics ; University of Oxford [Oxford]
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
- Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) ; Observatoire des Sciences de l'Univers en région Centre (OSUC) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Paris] (CNES)
- Unité Scientifique de la Station de Nançay (USN) ; Observatoire des Sciences de l'Univers en région Centre (OSUC) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)
- University of Southampton
- Joint Institute for VLBI in Europe (JIVE ERIC)
- Ruhr-Universität Bochum [Bochum]
- Astronomical Institute Anton Pannekoek (AI PANNEKOEK) ; University of Amsterdam [Amsterdam] (UvA)
- University of Oulu
- Jodrell Bank Centre for Astrophysics ; University of Manchester [Manchester]
- Center for Information Technology CIT ; Université de Groningen
- Department of Physics and Astronomy [Ghent] ; Universiteit Gent = Ghent University [Belgium] (UGENT)
- Department of Physics-Electronics ; Rhodes University, Grahamstown
- Argelander-Institut für Astronomie (AlfA) ; Rheinische Friedrich-Wilhelms-Universität Bonn
- ANR-09-JCJC-0001,OPALES(2009)
Description
The Sun's activity leads to bursts of radio emission, among other phenomena. An example is type-III radio bursts. They occur frequently and appear as short-lived structures rapidly drifting from high to low frequencies in dynamic radio spectra. They are usually interpreted as signatures of beams of energetic electrons propagating along coronal magnetic field lines. Here we present novel interferometric LOFAR (LOw Frequency ARray) observations of three solar type-III radio bursts and their reverse bursts with high spectral, spatial, and temporal resolution. They are consistent with a propagation of the radio sources along the coronal magnetic field lines with nonuniform speed. Hence, the type-III radio bursts cannot be generated by a monoenergetic electron beam, but by an ensemble of energetic electrons with a spread distribution in velocity and energy. Additionally, the density profile along the propagation path is derived in the corona. It agrees well with three-fold coronal density model by (1961, ApJ, 133, 983).
Abstract
International audience
Additional details
- URL
- https://hal-insu.archives-ouvertes.fr/insu-01897905
- URN
- urn:oai:HAL:insu-01897905v1
- Origin repository
- UNICA