Infrared observations of Jovian aurora from Juno's first orbits: Main oval and satellite footprints

Jupiter; NASA; Aurora; Channel observations; Emission pattern; Infrared emissions; Infrared observations; Intense emission; Jupiters; Spatial and temporal distribution; Orbits

Abstract :

[en] The Jovian Infrared Auroral Mapper (JIRAM) is an imager/spectrometer on board NASA/Juno mission for the study of the Jovian aurorae. The first results of JIRAM's imager channel observations of the H3 + infrared emission, collected around the first Juno perijove, provide excellent spatial and temporal distribution of the Jovian aurorae, and show the morphology of the main ovals, the polar regions, and the footprints of Io, Europa and Ganymede. The extended Io “tail” persists for ~3 h after the passage of the satellite flux tube. Multi-arc structures of varied spatial extent appear in both main auroral ovals. Inside the main ovals, intense, localized emissions are observed. In the southern aurora, an evident circular region of strong depletion of H3 + emissions is partially surrounded by an intense emission arc. The southern aurora is brighter than the north one in these observations. Similar, probably conjugate emission patterns are distinguishable in both polar regions. ©2017. American Geophysical Union. All Rights Reserved.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Mura, A.; INAF-Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy

Adriani, A.; INAF-Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy

Altieri, F.; INAF-Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy

Connerney, J. E. P.; NASA Goddard Space Flight Center, Greenbelt, MD, United States

Bolton, S. J.; Southwest Research Institute, San Antonio, TX, United States

Moriconi, M. L.; CNR-Istituto di Scienze dell'Atmosfera e del Clima, Bologna, Italy

Gérard, Jean-Claude ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Kurth, W. S.; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States

Dinelli, B. M.; CNR-Istituto di Scienze dell'Atmosfera e del Clima, Bologna, Italy

Fabiano, F.; INAF-Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy, CNR-Istituto di Scienze dell'Atmosfera e del Clima, Bologna, Italy

More authors (19 more)

Language :

English

Title :

Infrared observations of Jovian aurora from Juno's first orbits: Main oval and satellite footprints

Publication date :

May 2017

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Blackwell Publishing Ltd, United States

Volume :

Issue :

Pages :

5308-5316

Peer reviewed :

Peer Reviewed verified by ORBi

Name of the research project :

2016-23-H.0; 2016-353 23-H.0

Funders :

ASI - Agenzia Spaziale Italiana [IT]
INAF - Istituto Nazionale di Astrofisica [IT]

Available on ORBi :

since 10 August 2017

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