Unpublished conference/Abstract (Scientific congresses and symposiums)
Auroral emission at Jupiter, through Juno's UVS eyes
Grodent, Denis; Bonfond, Bertrand; Gladstone, G. et al.
2015Magnetospheres of the Outer Planets 2015
 

Files


Full Text
MOP_2015_Grodent.pptx
Author preprint (50.09 MB)
Download
Annexes
MOP_2015_Grodent_PDF.pdf
Publisher postprint (5.85 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Juno; Jupiter; Aurora; LiSRI
Abstract :
[en] Juno’s orbit insertion around Jupiter will take place in little bit more than one year (July 2016). After a 107-day capture orbit (Oct. 2016), it will perform a series of 33 eleven-day science polar orbits offering unprecedented views of the auroral regions of Jupiter. The science payload of Juno includes an UltraViolet Spectrograph (UVS) that will characterize the UV auroral emissions of Jupiter over all science orbits. It will obtain high-resolution images and spectra that will provide context for Juno’s in situ particles and fields measurements in the larger polar magnetosphere with Juno’s JADE and JEDI detectors. At the same time, the MAG instrument will accurately constrain magnetic field models, which will provide the connection between Juno and its field line footprint in the Jovian aurora. The UVS instrument consists of a solar blind MCP detector with a “dog-bone” shape FOV of 0.2°x2.5°+0.025°x2°+0.2°x2.5° providing a spatial resolution of 125 km from 1RJ above the aurora and a spectral resolution of ~0.5 nm (~2 nm for extended sources). It is sensitive to EUV-FUV radiation ranging from 70 nm to 205 nm. Juno is a spin-stabilized spacecraft and is rotating at a frequency of 2 RPM. UVS will take advantage of this motion to scan the auroral regions in the direction perpendicular to the slit, while its steerable pickup mirror (±30° from the spin plane) will make it possible to point at specific regions of the aurora. Juno’s highly eccentric science orbits have a perijove close to 1.05 RJ (~5000 km above cloud deck) and an apojove at ~38 RJ. These orbits approximately lie in the Dawn meridian plane and are such that each successive pass is at a Jovian longitude displaced by 204° from the previous perijove. At perijove, Juno’s velocity will be ~60 km/s and about 20 km/s above the poles, meaning that the spacecraft will move over the northern and southern auroral regions in approximately two hours. In this study, we are using existing HST STIS time-tag sequences of Jupiter’s UV aurorae in order to simulate the expected measurements through UVS FOV along Juno’s predicted trajectory. The simulations account for realistic instrumental specifications and pointing and for the temporal and spatial variability of the aurora. We show the results of image reconstruction obtained from scanning the auroral region with UVS slit and provide some limits on the expected data quality as a function of the location of Juno along its orbit. We also suggest portions of the science orbits for which supporting HST observations will be necessary.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Grodent, Denis  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Bonfond, Bertrand  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gladstone, G.;  Southwest Research Institute, San Antonio, Texas, USA
Gérard, Jean-Claude  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Gustin, Jacques ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Radioti, Aikaterini ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Dumont, Maïté ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Palmaerts, Benjamin  ;  Université de Liège - ULiège > Form. doct. sc. (sc. spatiales - Bologne)
The Juno Science Team;  Southwest Research Institute, San Antonio, Texas, USA
Language :
English
Title :
Auroral emission at Jupiter, through Juno's UVS eyes
Publication date :
02 June 2015
Event name :
Magnetospheres of the Outer Planets 2015
Event organizer :
Georgia Tech
Event place :
Atlanta, Georgia, United States
Event date :
1-6 juin 2015
By request :
Yes
Audience :
International
Additional URL :
Available on ORBi :
since 19 June 2015

Statistics


Number of views
90 (9 by ULiège)
Number of downloads
29 (2 by ULiège)

Bibliography


Similar publications



Contact ORBi