Universität zu Köln

Bonfond, B., Saur, J., Grodent, D., Badman, S. V., Bisikalo, D., Shematovich, V., Gerard, J. -C. and Radioti, A. (2017). The tails of the satellite auroral footprints at Jupiter. J. Geophys. Res-Space Phys., 122 (8). S. 7985 - 7997. WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2169-9402

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Abstract

The electromagnetic interaction between Io, Europa, and Ganymede and the rotating plasma that surrounds Jupiter has a signature in the aurora of the planet. This signature, called the satellite footprint, takes the form of a series of spots located slightly downstream of the feet of the field lines passing through the moon under consideration. In the case of Io, these spots are also followed by an extended tail in the downstream direction relative to the plasma flow encountering the moon. A few examples of a tail for the Europa footprint have also been reported in the northern hemisphere. Here we present a simplified Alfvenic model for footprint tails and simulations of vertical brightness profiles for various electron distributions, which favor such a model over quasi-static models. We also report here additional cases of Europa footprint tails, in both hemispheres, even though such detections are rare and difficult. Furthermore, we show that the Ganymede footprint can also be followed by a similar tail. Finally, we present a case of a 320 degrees long Io footprint tail, while other cases in similar configurations do not display such a length.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bonfond, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Saur, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grodent, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Badman, S. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bisikalo, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Shematovich, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gerard, J. -C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Radioti, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-224159
DOI:	10.1002/2017JA024370
Journal or Publication Title:	J. Geophys. Res-Space Phys.
Volume:	122
Number:	8
Page Range:	S. 7985 - 7997
Date:	2017
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	2169-9402
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language IO; GANYMEDE; EUROPA; SPOTS; MODEL; WAKE Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22415