RPC observation of the development and evolution of plasma interaction boundaries at 67P/Churyumov-Gerasimenko

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • K. E. Mandt
  • A. Eriksson
  • N. J. T. Edberg
  • C. Koenders
  • T. Broiles
  • S. A. Fuselier
  • P. Henri
  • Z. Nemeth
  • N. Biver
  • A. Beth
  • J. Burch
  • C. Carr
  • K. Chae
  • A. J. Coates
  • E. Cupido
  • M. Galand
  • K.-H. Glassmeier
  • C. Goetz
  • R. Goldstein
  • K. C. Hansen
  • J. Haiducek
  • J.-P. Lebreton
  • A. Luspay-Kuti
  • P. Mokashi
  • H. Nilsson
  • A. Opitz
  • I. Richter
  • M. Samara
  • K. Szego
  • C.-Y. Tzou
  • M. Volwerk
  • C. Simon Wedlund
  • G. Stenberg Wieser

Research units

  • Southwest Research Institute
  • University of Texas at San Antonio
  • Swedish Institute of Space Physics
  • Technical University of Braunschweig
  • Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
  • Wigner Research Centre for Physics
  • Observatoire de Paris
  • Imperial College London
  • University College of London
  • University of Michigan, Ann Arbor
  • NASA Goddard Space Flight Center
  • University of Bern
  • Austrian Academy of Sciences
  • University of Oslo

Abstract

One of the primary objectives of the Rosetta Plasma Consortium, a suite of five plasma instruments on-board the Rosetta spacecraft, is to observe the formation and evolution of plasma interaction regions at the comet 67P/Churyumov-Gerasimenko (67P/CG). Observations made between 2015 April and 2016 February show that solar wind-cometary plasma interaction boundaries and regions formed around 2015 mid-April and lasted through early 2016 January. At least two regions were observed, separated by an ion-neutral collisionopause boundary. The inner region was located on the nucleus side of the boundary and was characterized by low-energy water-group ions, reduced magnetic field pileup and enhanced electron densities. The outer region was located outside of the boundary and was characterized by reduced electron densities, water-group ions that are accelerated to energies above 100 eV and enhanced magnetic field pileup compared to the inner region. The boundary discussed here is outside of the diamagnetic cavity and shows characteristics similar to observations made on-board the Giotto spacecraft in the ion pileup region at 1P/Halley. We find that the boundary is likely to be related to ion-neutral collisions and that its location is influenced by variability in the neutral density and the solar wind dynamic pressure.

Details

Original languageEnglish
Number of pages46
JournalMonthly Notices of the Royal Astronomical Society
Volume462
Early online date20 Jul 2016
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed
EventESLAB Symposium - Leiden, Netherlands
Duration: 14 Mar 201618 Mar 2016
Conference number: 50

    Research areas

  • plasmas, solar wind, comets: general

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