Deformation and evolution of solar wind discontinuities through their interactions with the Earth's bow shock

DOI Web Site Web Site 被引用文献1件
  • K. Keika
    Space Research Institute Austrian Academy of Sciences Graz Austria
  • R. Nakamura
    Space Research Institute Austrian Academy of Sciences Graz Austria
  • W. Baumjohann
    Space Research Institute Austrian Academy of Sciences Graz Austria
  • V. Angelopoulos
    Institute of Geophysics and Planetary Physics University of California Los Angeles California USA
  • K. Kabin
    Department of Physics University of Alberta Edmonton, Alberta Canada
  • K. H. Glassmeier
    Institut für Geophysik und extraterrestrische Physik Technische Universität Braunschweig Braunschweig Germany
  • D. G. Sibeck
    NASA Goddard Space Flight Center Greenbelt Maryland USA
  • W. Magnes
    Space Research Institute Austrian Academy of Sciences Graz Austria
  • H. U. Auster
    Institut für Geophysik und extraterrestrische Physik Technische Universität Braunschweig Braunschweig Germany
  • K. H. Fornaçon
    Institut für Geophysik und extraterrestrische Physik Technische Universität Braunschweig Braunschweig Germany
  • J. P. McFadden
    Space Sciences Laboratory University of California Berkeley California USA
  • C. W. Carlson
    Space Sciences Laboratory University of California Berkeley California USA
  • E. A. Lucek
    Space and Atmospheric Physics Group Imperial College London London UK
  • C. M. Carr
    Space and Atmospheric Physics Group Imperial College London London UK
  • I. Dandouras
    Centre d'Etude Spatiale des Rayonnements Université Paul Sabatier, UMR 5187, CNRS Toulouse France
  • R. Rankin
    Department of Physics University of Alberta Edmonton, Alberta Canada

書誌事項

公開日
2009-01
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2008ja013481
公開者
American Geophysical Union (AGU)

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説明

<jats:p>The present study examines the interaction of solar wind discontinuities with the Earth's bow shock, using multipoint observations in the magnetosheath by Time History of Events and Macroscale Interactions During Substorms (THEMIS), Cluster, and Double Star TC1. We focus on the deformation and evolution of two discontinuities observed on 21 June 2007, one of which involves a density increase and a magnetic field decrease, while the other is accompanied by a density decrease and a magnetic field increase. In the magnetosheath, the discontinuities are deformed into a concave shape; that is, the normal is inclined toward dusk (dawn) on the dawnside (duskside). The density‐increase (‐decrease) discontinuity is being compressed (expanded) as it propagates in the magnetosheath. We conclude that the compression (expansion) is due to antisunward (sunward) motion of the bow shock which is initiated or enhanced by the impact of the discontinuity on the bow shock. The steepening of <jats:italic>B</jats:italic><jats:sub>z</jats:sub> reversal followed by an overshoot of the total magnetic field, which appears at the trailing edge of the density‐decrease discontinuity, is also discussed.</jats:p>

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