On magnetospheric electron impact ionisation and dynamics in Titan's ram-side and polar ionosphere - a Cassini case study

Karin Ågren; Jan-Erik Wahlund; Ronan Modolo; D Lummerzheim; M. Galand; I. Müller-Wodarg; P Canu; W S Kurth; T E Cravens; R V Yelle; J. H Waite Jr; A. J. Coates; G. R. Lewis; D. T Young; C Bertucci; M. K. Dougherty

doi:10.5194/angeo-25-2359-2007

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On magnetospheric electron impact ionisation and dynamics in Titan's ram-side and polar ionosphere - a Cassini case study

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On magnetospheric electron impact ionisation and dynamics in Titan's ram-side and polar ionosphere - a Cassini case study

Karin Ågren, Jan-Erik Wahlund, Ronan Modolo, D Lummerzheim, M. Galand, I. Müller-Wodarg, P Canu, W S Kurth, T E Cravens, R V Yelle, …

Annales geophysicae (1988), Vol.25(11), pp.2359-2369

11/29/2007

DOI: 10.5194/angeo-25-2359-2007

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Abstract

We present data from the sixth Cassini flyby of Titan (T5), showing that the magnetosphere of Saturn strongly interacts with the moon's ionosphere and exo-ionosphere. A simple electron ionisation model provides a reasonable agreement with the altitude structure of the ionosphere. Furthermore, we suggest that the dense and cold exo-ionosphere (from the exobase at 1430 km and outward to several Titan radii from the surface) can be explained by magnetospheric forcing and other transport processes whereas exospheric ionisation by impacting low energy electrons seems to play a minor role.

Natural Sciences

Physical Sciences

Physics

Fysik

ionosphere (Planetary ionospheres; Plasma; temperature and density); Magnetospheric physics Magnetosphere-ionosphere interactions

Naturvetenskap

Details

Title: Subtitle: On magnetospheric electron impact ionisation and dynamics in Titan's ram-side and polar ionosphere - a Cassini case study
Creators: Karin Ågren - Swedish Institute of Space Physics
Jan-Erik Wahlund - Swedish Institute of Space Physics
Ronan Modolo - Swedish Institute of Space Physics
D Lummerzheim - University of Alaska Fairbanks
M. Galand - Imperial College London
I. Müller-Wodarg
P Canu - Laboratoire de Physique des Plasmas
W S Kurth - Physics and Astronomy
T E Cravens - University of Kansas
R V Yelle - University of Arizona
J. H Waite Jr - University of Michigan
A. J. Coates - University College London
G. R. Lewis - University College London
D. T Young - Southwest Research Institute
C Bertucci - Institute of Astronomy and Space Physics
M. K. Dougherty - Imperial College London
Resource Type: Journal article
Publication Details: Annales geophysicae (1988), Vol.25(11), pp.2359-2369
DOI: 10.5194/angeo-25-2359-2007
ISSN: 1432-0576
eISSN: 1432-0576
Language: English
Date published: 11/29/2007
Academic Unit: Physics and Astronomy
Record Identifier: 9984455278602771

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