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Poster (Scientific congresses and symposiums)
Magnetosphere Mapping of Jupiter’s Polar Auroral Bright Spot
Haewsantati, Kamolporn; Wannawichian, Suwicha; Bonfond, Bertrand et al.
2019AGU Fall Meeting 2019
 

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Keywords :
Hubble Space Telescope
Abstract :
[en] This work presents the study of presents the study of polar bright spots, unstable and ambiguous features in Jupiter’s polar aurora. Images were taken by the Hubble Space Telescope (HST) using the Advanced Camera for Surveys (ACS) instrument. We analyzed the brightness and locations of the bright spots to study their variability. Here we present eight bright spots which were clearly seen in Jupiter’s aurora images taking during May-June 2007. The latitude and longitude locations of bright spots were found to be colocated to within 10 degrees. In most cases, these features evolve from an undetermined shape into a well confined spots, before they eventually fade into the background emission. The counterpart of these bright spots in Jupiter's magnetosphere were determined using flux equivalent method proposed by Vogt et al. (2011 and 2015) and magnetic field tracing method, based on several magnetic models and direct observations. We find that the mapped locations in magnetosphere correspond to distances larger than ~70 Jovian radii from Jupiter with local time mostly near noon. The results suggest that the bright spots can be related with the polar cusp process, which remain poorly understood.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Haewsantati, Kamolporn  ;  Université de Liège - ULiège > STAR
Wannawichian, Suwicha
Bonfond, Bertrand  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Clarke, John
Nichols, Jonathan
Vogt, Marissa
Language :
English
Title :
Magnetosphere Mapping of Jupiter’s Polar Auroral Bright Spot
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 :
BELSPO - Service Public Fédéral de Programmation Politique scientifique [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 21 January 2020

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