Are there Kronian electrons in the inner heliosphere

被引：0
|
作者：
Lange, D. [1 ]
Fichtner, H. [1 ]
机构：
[1] Institut für Theoretische Physik IV, Weltraum- und Astrophysik Ruhr-Universität Bochum, Germany
来源：
Astronomy and Astrophysics | 2008年 / 482卷 / 03期
关键词：
Context. As the largest in our solar system the Jovian magnetosphere is treated in the literature as the dominant source of a few-MeV electrons; which have been measured by various spacecraft. In particular; observations obtained with Ulysses have significantly broadened the available data base.Aims. We simulated the transports of MeV electrons in the heliosphere on the basis of a time-dependent; three-dimensional modulation model. For this purpose the cosmic rays; the Jovian and the Saturnian electron sources have been; for the first time; considered together in the simulation of electron fluxes. The simulated electron intensities are discussed along the Ulysses and Cassini trajectories. The Ulysses spacecraft already passed by the planet Jupiter twice (1992; 2004); and Cassini passed by Jupiter in 2001 and reached Saturn in the year 2004. The strength of the electron source at Jupiter is relatively well known and well modelled. To determine the source strength of Saturn in comparison to that of Jupiter; we compared all available spacecraft measurements at Jupiter/Saturn in the overlapping energy range. We study the general distribution of Kronian electrons by successively using three different strengths of the Saturn source in our simulations. In addition; the effects of the solar activity are taken into account by varying the velocity field of the solar wind and the anisotropic diffusion tensor.Methods. Studying the particle diffusion is particularly relevant; because the really unknown function in the used transport equation is the diffusion tensor. The Jovian and/or Kronian electrons are suitable for studying the transport of energetic particles because the source locations are well known.Results. At 1 MeV the intensities along the Ulysses and the Cassini trajectories are clearly influenced by the presence of Kronian electrons.Conclusions. Our results reveal that the electrons from the Kronian magnetosphere; as the second largest; cannot be neglected in the very-low MeV energy range. © 2008 ESO;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
页码：973 / 979
相关论文
共 50 条
  • [41] Cosmic electron gradients in the inner heliosphere
    Clem, J
    Evenson, P
    Heber, B
    GEOPHYSICAL RESEARCH LETTERS, 2002, 29 (23) : 11 - 1
  • [42] Interaction of magnetic clouds in the inner heliosphere
    Romashets, E
    Cargill, P
    Schmidt, J
    SOLAR WIND TEN, PROCEEDINGS, 2003, 679 : 794 - 796
  • [43] REMOTE SENSING OF THE INNER HELIOSPHERE - Preface
    Bisi, M. M.
    Breen, A. R.
    van Driel-Gesztelyi, L.
    Mandrini, C. H.
    SOLAR PHYSICS, 2010, 265 (1-2) : 1 - 3
  • [44] Coronal Electron Temperature Inferred from the Strahl Electrons in the Inner Heliosphere: Parker Solar Probe and Helios Observations
    Bercic, Laura
    Larson, Davin
    Whittlesey, Phyllis
    Maksimovic, Milan
    Badman, Samuel T.
    Landi, Simone
    Matteini, Lorenzo
    Bale, Stuart D.
    Bonnell, John W.
    Case, Anthony W.
    de Wit, Thierry Dudok
    Goetz, Keith
    Harvey, Peter R.
    Kasper, Justin C.
    Korreck, Kelly E.
    Livi, Roberto
    MacDowall, Robert J.
    Malaspina, David M.
    Pulupa, Marc
    Stevens, Michael L.
    ASTROPHYSICAL JOURNAL, 2020, 892 (02):
  • [45] Global MHD Modeling of the Solar Corona and Inner Heliosphere for the Whole Heliosphere Interval
    P. Riley
    R. Lionello
    J. A. Linker
    Z. Mikic
    J. Luhmann
    J. Wijaya
    Solar Physics, 2011, 274 : 361 - 377
  • [46] Global MHD Modeling of the Solar Corona and Inner Heliosphere for the Whole Heliosphere Interval
    Riley, P.
    Lionello, R.
    Linker, J. A.
    Mikic, Z.
    Luhmann, J.
    Wijaya, J.
    SOLAR PHYSICS, 2011, 274 (1-2) : 361 - 377
  • [47] Global MHD Modeling of the Solar Corona and Inner Heliosphere for the Whole Heliosphere Interval
    Riley, Pete
    Linker, Jon A.
    Mikic, Zoran
    HIGHLIGHTS OF ASTRONOMY, VOL 15, 2010, 15 : 491 - 493
  • [48] The global modulation of Galactic and Jovian electrons in the heliosphere
    Rendani R. Nndanganeni
    Marius S. Potgieter
    Astrophysics and Space Science, 2018, 363
  • [49] The global modulation of Galactic and Jovian electrons in the heliosphere
    Nndanganeni, Rendani R.
    Potgieter, Marius S.
    ASTROPHYSICS AND SPACE SCIENCE, 2018, 363 (07)
  • [50] CALET Measurements of Cosmic Ray Electrons in the Heliosphere
    Komori, Yoshiko
    Torii, Shoji
    Shimizu, Yuki
    Tamura, Tadahisa
    Yoshida, Kenji
    Terasawa, Toshio
    Munakata, Kazuoki
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2009, 78 : 188 - 191
12345