ORBi: Radioti Aikaterini - Auroral footprints of tail reconnection at Jupiter and Saturn

Reference : Auroral footprints of tail reconnection at Jupiter and Saturn


	Document type :	Scientific congresses and symposiums : Unpublished conference
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/94034

Title :	Auroral footprints of tail reconnection at Jupiter and Saturn
Language :	English
Author, co-author :	Radioti, Aikaterini [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
	Grodent, Denis [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
	Gérard, Jean-Claude [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Bonfond, Bertrand [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
	Gustin, Jacques [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
	Pryor, Wayne [> >]
Publication date :	3-May-2010
On invitation :	No
Audience :	International
Event name :	EGU General Assembly 2010
Event date :	du 2 mai 2010 au 7 mai 2010
Event organizer :	European Geophysical Union
Event place (city) :	Vienne
Event country :	Autriche
Keywords :	[en] Jupiter ; Saturn ; aurora
Abstract :	[en] Tail reconnection at Jupiter’s magnetosphere, has recently been shown to leave its signature in the aurora. The Hubble Space Telescope observed transient polar dawn spots on the Jovian aurora, with a characteristic recurrence period of 2-3 days. Because of their periodic occurrence cycle and observed location, it is suggested that the transient auroral features are related to the precipitated, heated plasma during reconnection processes taking place in the Jovian magnetotail. Particularly, it is proposed that the transient auroral spots are triggered by the planetward moving flow bursts released during the process. A comparison of their properties with those of the <br />auroral spots strengthen the conclusion that they are signatures of tail reconnection. <br />Cassini recently revealed magnetotail reconnection events at Saturn similar to those observed at Jupiter. Based on the UVIS dataset we present transient features at Saturn’s polar auroral region, which are possible signatures of tail reconnection. We study their size, power, duration and duty cycle and we suggest possible triggering mechanisms associated with magnetotail dynamics. We compare these auroral emissions with those at Jupiter and we discuss how energy is transferred to the ionosphere during tail reconnection.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/94034
	also: http://hdl.handle.net/2268/104447
Other URL :	http://adsabs.harvard.edu/abs/2010EGUGA..12.9542R

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