Journal article
Jupiter's Aurora Observed With HST During Juno Orbits 3 to 7
Journal of geophysical research. Space physics, Vol.123(5), pp.3299-3319
05/2018
DOI: 10.1002/2017JA025046
Abstract
A large set of observations of Jupiter's ultraviolet aurora was collected with the Hubble Space Telescope concurrently with the NASA-Juno mission, during an eight-month period, from 30 November 2016 to 18 July 2017. These Hubble observations cover Juno orbits 3 to 7 during which Juno in situ and remote sensing instruments, as well as other observatories, obtained a wealth of unprecedented information on Jupiter's magnetosphere and the connection with its auroral ionosphere. Jupiter's ultraviolet aurora is known to vary rapidly, with timescales ranging from seconds to one Jovian rotation. The main objective of the present study is to provide a simplified description of the global ultraviolet auroral morphology that can be used for comparison with other quantities, such as those obtained with Juno. This represents an entirely new approach from which logical connections between different morphologies may be inferred. For that purpose, we define three auroral subregions in which we evaluate the auroral emitted power as a function of time. In parallel, we define six auroral morphology families that allow us to quantify the variations of the spatial distribution of the auroral emission. These variations are associated with changes in the state of the Jovian magnetosphere, possibly influenced by Io and the Io plasma torus and by the conditions prevailing in the upstream interplanetary medium. This study shows that the auroral morphology evolved differently during the five similar to 2week periods bracketing the times of Juno perijove (PJ03 to PJ07), suggesting that during these periods, the Jovian magnetosphere adopted various states.
Details
- Title: Subtitle
- Jupiter's Aurora Observed With HST During Juno Orbits 3 to 7
- Creators
- Denis Grodent - University of LiègeB. Bonfond - University of LiègeZ. Yao - University of LiègeJ-C. Gerard - University of LiègeA. Radioti - University of LiègeM. Dumont - University of LiègeB. Palmaerts - University of LiègeA. Adriani - Institute for Space Astrophysics and PlanetologyS. V. Badman - Lancaster UniversityE. J. Bunce - University of LeicesterJ. T. Clarke - Boston UniversityJ. E. P. Connerney - Goddard Space Flight CenterG. R. Gladstone - Southwest Research InstituteT. Greathouse - Southwest Research InstituteT. Kimura - Wako UniversityW. S. Kurth - University of IowaB. H. Mauk - Johns Hopkins University Applied Physics LaboratoryD. J. McComas - Princeton UniversityJ. D. Nichols - University of LeicesterG. S. Orton - California Institute of TechnologyL. Roth - KTH Royal Institute of TechnologyJ. Saur - University of CologneP. Valek - Southwest Research Institute
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.123(5), pp.3299-3319
- DOI
- 10.1002/2017JA025046
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Publisher
- Amer Geophysical Union
- Number of pages
- 21
- Grant note
- ST/P002382/1; ST/K001000/1; ST/M005534/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Fund for Scientific Research (F.R.S-FNRS); Fonds de la Recherche Scientifique - FNRS Universite Paul Sabatier, Toulouse CNRS; Centre National de la Recherche Scientifique (CNRS) CNES; Centre National D'etudes Spatiales Marie Curie COFUND post-doctoral fellowship ST/K001000/1 / STFC grant; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) 699041X / NASA; National Aeronautics & Space Administration (NASA) HST GO-14634 / NASA/ESA Hubble Space Telescope; National Aeronautics & Space Administration (NASA) Observatoire de Paris ST/M005534/1; ST/P002382/1; ST/K001000/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Belgian Federal Science Policy Office 16K17812 / Grants-in-Aid for Scientific Research; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; Grants-in-Aid for Scientific Research (KAKENHI) PRODEX program Southwest Research Institute
- Language
- English
- Date published
- 05/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455555702771
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