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An Overview of Juno-UVS Observations of Jupiter’s Auroras through Perijove 6
Gladstone, G. R.; Versteeg, M. H.; Greathouse, T. K. et al.
2017Magnetosphere of Outer Planets meeting
 

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Keywords :
Jupiter; Juno; aurora
Abstract :
[en] Currently, Juno’s Ultraviolet Spectrograph (UVS) has observed the Jovian aurora during five perijove passes. On each pass, UVS observes Jupiter for 10 hours centered on closest approach in a series of swaths, with one swath per 30s spin of the Juno spacecraft. During this time the range to the aurora drops from 6 RJ to 0.3 RJ or less in the north (and reverses this in the south), so that spatial resolution and coverage change dramatically. The UVS scan mirror is used to target di ff erent features, as the auroral regions are generally much larger than UVS’s 7-degree long slit can accommodate in a single swath. Typically, the scan mirror position is changed every 2 -5 Juno spins, to track specific targets or just raster across the entire auroral region. Since UVS only observes any particular location for 17 ms/swath, the series of swaths provide snapshots of ultraviolet auroral brightness and color. A variety of forms and activity levels are represented in this data set, and many have been described before with HST observations, but are seen here with higher spatial resolution. One interesting result is that in false color images (where RGB colors are assigned to long, medium, and short UV wavelengths, respectively), the emission morphology often alternates red and blue, in a way similar to patterns expected of large scale current systems. Further results which emerge as the UVS data are compared with data from the other Juno auroral instruments will also be presented.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gladstone, G. R.
Versteeg, M. H.
Greathouse, T. K.
Hue, V.
Kammer, J. A.
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Grodent, Denis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Bonfond, Bertrand  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Bolton, S.
Connerney, J. E. P.
Levin, S. M.
Adriani, A.
Kurth, W. S.
Mauk, B. H.
Valek, P.
McComas, D. J.
Orton, G. S.
Bagenal, F.
More authors (8 more) Less
Language :
English
Title :
An Overview of Juno-UVS Observations of Jupiter’s Auroras through Perijove 6
Publication date :
14 June 2017
Event name :
Magnetosphere of Outer Planets meeting
Event organizer :
Swedish Institute for Space Physics (Institutet för rymdfysik, IRF) and the Royal Institute of Technology (Kungliga Tekniska högskolan, KTH)
Event place :
Uppsala, Sweden
Event date :
du 12 au 16 juin 2017
Audience :
International
Available on ORBi :
since 21 December 2017

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