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Title: Sunward-propagating Solar Energetic Electrons inside Multiple Interplanetary Flux Ropes

Abstract

On 2013 December 2 and 3, the SEPT and STE instruments on board STEREO-A observed two solar energetic electron events with unusual sunward-directed fluxes. Both events occurred during a time interval showing typical signatures of interplanetary coronal mass ejections (ICMEs). The electron timing and anisotropies, combined with extreme-ultraviolet solar imaging and radio wave spectral observations, are used to confirm the solar origin and the injection times of the energetic electrons. The solar source of the ICME is investigated using remote-sensing observations and a three-dimensional reconstruction technique. In situ plasma and magnetic field data combined with energetic electron observations and a flux-rope model are used to determine the ICME magnetic topology and the interplanetary electron propagation path from the Sun to 1 au. Two consecutive flux ropes crossed the STEREO-A location and each electron event occurred inside a different flux rope. In both cases, the electrons traveled from the solar source to 1 au along the longest legs of the flux ropes still connected to the Sun. During the December 2 event, energetic electrons propagated along the magnetic field, while during the December 3 event they were propagating against the field. As found by previous studies, the energetic electron propagation timesmore » are consistent with a low number of field line rotations N < 5 of the flux rope between the Sun and 1 au. The flux rope model used in this work suggests an even lower number of rotations.« less

Authors:
; ; ;  [1]; ; ;  [2]; ;  [3];  [4];  [5]
  1. Dpto. de Física y Matemáticas, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid (Spain)
  2. Institut für Experimentelle und Angewandte Physik, University of Kiel, D-24118, Kiel (Germany)
  3. Institute of Physics/Kanzelhöhe Observatory, University of Graz, A-8010 Graz (Austria)
  4. Institut für Astrophysik, Georg-August-Universität Göttingen, D-37077, Göttingen (Germany)
  5. The Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723 (United States)
Publication Date:
OSTI Identifier:
22663622
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 840; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; EMISSION; EXTREME ULTRAVIOLET RADIATION; INJECTION; MAGNETIC FIELDS; MASS; PLASMA; RADIOWAVE RADIATION; REMOTE SENSING; ROTATION; SEASONAL THERMAL ENERGY STORAGE; SUN; TAIL ELECTRONS; THREE-DIMENSIONAL CALCULATIONS; TOPOLOGY

Citation Formats

Gómez-Herrero, Raúl, Hidalgo, Miguel A., Carcaboso, Fernando, Blanco, Juan J., Dresing, Nina, Klassen, Andreas, Heber, Bernd, Temmer, Manuela, Veronig, Astrid, Bučík, Radoslav, and Lario, David, E-mail: raul.gomezh@uah.es. Sunward-propagating Solar Energetic Electrons inside Multiple Interplanetary Flux Ropes. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA6C5C.
Gómez-Herrero, Raúl, Hidalgo, Miguel A., Carcaboso, Fernando, Blanco, Juan J., Dresing, Nina, Klassen, Andreas, Heber, Bernd, Temmer, Manuela, Veronig, Astrid, Bučík, Radoslav, & Lario, David, E-mail: raul.gomezh@uah.es. Sunward-propagating Solar Energetic Electrons inside Multiple Interplanetary Flux Ropes. United States. doi:10.3847/1538-4357/AA6C5C.
Gómez-Herrero, Raúl, Hidalgo, Miguel A., Carcaboso, Fernando, Blanco, Juan J., Dresing, Nina, Klassen, Andreas, Heber, Bernd, Temmer, Manuela, Veronig, Astrid, Bučík, Radoslav, and Lario, David, E-mail: raul.gomezh@uah.es. Wed . "Sunward-propagating Solar Energetic Electrons inside Multiple Interplanetary Flux Ropes". United States. doi:10.3847/1538-4357/AA6C5C.
@article{osti_22663622,
title = {Sunward-propagating Solar Energetic Electrons inside Multiple Interplanetary Flux Ropes},
author = {Gómez-Herrero, Raúl and Hidalgo, Miguel A. and Carcaboso, Fernando and Blanco, Juan J. and Dresing, Nina and Klassen, Andreas and Heber, Bernd and Temmer, Manuela and Veronig, Astrid and Bučík, Radoslav and Lario, David, E-mail: raul.gomezh@uah.es},
abstractNote = {On 2013 December 2 and 3, the SEPT and STE instruments on board STEREO-A observed two solar energetic electron events with unusual sunward-directed fluxes. Both events occurred during a time interval showing typical signatures of interplanetary coronal mass ejections (ICMEs). The electron timing and anisotropies, combined with extreme-ultraviolet solar imaging and radio wave spectral observations, are used to confirm the solar origin and the injection times of the energetic electrons. The solar source of the ICME is investigated using remote-sensing observations and a three-dimensional reconstruction technique. In situ plasma and magnetic field data combined with energetic electron observations and a flux-rope model are used to determine the ICME magnetic topology and the interplanetary electron propagation path from the Sun to 1 au. Two consecutive flux ropes crossed the STEREO-A location and each electron event occurred inside a different flux rope. In both cases, the electrons traveled from the solar source to 1 au along the longest legs of the flux ropes still connected to the Sun. During the December 2 event, energetic electrons propagated along the magnetic field, while during the December 3 event they were propagating against the field. As found by previous studies, the energetic electron propagation times are consistent with a low number of field line rotations N < 5 of the flux rope between the Sun and 1 au. The flux rope model used in this work suggests an even lower number of rotations.},
doi = {10.3847/1538-4357/AA6C5C},
journal = {Astrophysical Journal},
number = 2,
volume = 840,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2017},
month = {Wed May 10 00:00:00 EDT 2017}
}