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Poster (Scientific congresses and symposiums)
A Keogram Analysis of Local Time Variations of Jupiter’s Ultraviolet Aurora using Juno UVS Observations
Greathouse, Thomas; Gladstone, Randy; Versteeg, Maarten et al.
2019AGU Fall Meeting 2019
 

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Abstract :
[en] With 20 successfully completed Perijoves, Juno UVS has collected an enormous amount of data with unprecedented views of the northern and southern auroras spanning all local time geometries. Juno UVS, with its spectral and spatial mapping capabilities allows for the retrieval of both UV brightness as well as color ratio information. Maps of both the brightness and color ratio of the main ovals and polar emissions display strong local time variations, some suggestive of ionospheric local time control while others magnetosphere local time drivers. In an attempt to quantitatively track the evolution of the auroral emission morphology and intensity, we have developed a process to create keograms of Jupiter’s auroral emissions. The keograms display a complicated evolution of northern and southern auroral emissions that depend not only on local time, but also on the overall state of the magnetosphere which varies perijove to perijove. We will present our method of producing the keograms and discuss insights we have drawn from them. Additionally, we present an attempt to trace the origin within the magnetodisk of the observed emissions via magnetic flux mapping using the Vogt et al. 2015 model updated to include the JRM09 magnetic field model.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Greathouse, Thomas
Gladstone, Randy
Versteeg, Maarten
Hue, Vincent
Kammer, Joshua
Davis, Michael Wayne
Bolton, Scott
Giles, Rohini
Levin, Steven
Connerney, John
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)
Bunce, Emma
Vogt, Marissa
More authors (5 more) Less
Language :
English
Title :
A Keogram Analysis of Local Time Variations of Jupiter’s Ultraviolet Aurora using Juno UVS Observations
Publication date :
11 December 2019
Event name :
AGU Fall Meeting 2019
Event organizer :
American Geophysical Union
Event place :
San Francisco, United States
Event date :
du 9 décembre 2019 au 13 décembre 2019
Audience :
International
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
BELSPO - Service Public Fédéral de Programmation Politique scientifique [BE]
Available on ORBi :
since 21 January 2020

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