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Plasma Dynamics and Structure of Titan's Induced Magnetosphere From Wave, Magnetic Field, and Plasma Measurements

  • K. Kim
  • , R. Modolo
  • , N. J.T. Edberg
  • , M. Morooka
  • , N. Romanelli
  • , C. Moissard
  • , M. K.G. Holmberg
  • , C. Bertucci
  • , J. J. Berthelier
  • , P. Canu
  • , R. Piberne
  • , A. J. Coates
  • , E. Dubinin
  • , L. Regoli
  • , W. S. Kurth
  • , J. E. Wahlund
  • , J. H. Waite
  • , M. K. Dougherty
  • Swedish Institute of Space Physics
  • Uppsala University
  • Sorbonne Université
  • University of Maryland
  • NASA Goddard Space Flight Center
  • University of York
  • Dunsink Observatory
  • Instituto de Astronomía y Física del Espacio
  • UCL Mullard Space Science Laboratory
  • Max-Planck-Institut für Sonnensystemforschung
  • Johns Hopkins University Applied Physics Laboratory
  • University of Iowa
  • University of Alabama
  • Imperial College London

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

In this study, we combine Cassini fields and particle observations to investigate Titan's induced magnetosphere from the TA to T82 flybys, including flybys from the Cassini prime, equinox, and part of the solstice mission, to investigate the average location and the shape of Titan's induced magnetosphere. Although earlier studies have provided valuable information on Titan's induced magnetosphere, they were largely based on separate analyses of fields and particle data. We provide an integrated map of electron density and temperature in Titan's near plasma environment to outline the external boundary of the induced magnetosphere. We identify a dense ionospheric region and an extended plasma wake with electron densities ranging between (Formula presented.) and (Formula presented.) c (Formula presented.). In addition, we systematize the spatial distribution of pick-up ions at Titan with respect to the background convective electric field. We indicate that pickup ions are found in the positive hemisphere of the Kronian plasma convective electric field. The mass of the observed pickup corresponds to methane group ions, (Formula presented.) ions as well as protons and molecular hydrogen ions. The Kronian background electric field progressively accelerates these ions, and we estimate its intensity by reconstructing the radial energy gain of this population in response to the convective electric field. We find the estimated from the pickup ions electric field values within 0.05 mV (Formula presented.) and 1.92 mV (Formula presented.) range, which is consistent with an estimate of 0.61 mV (Formula presented.) deduced from (Formula presented.) computation.

langue originaleAnglais
Numéro d'articlee2025JA034830
journalJournal of Geophysical Research: Space Physics
Volume131
Numéro de publication4
Les DOIs
étatPublié - 1 avr. 2026

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