Preliminary JIRAM results from Juno polar observations: 1. Methodology and analysis applied to the Jovian northern polar region

Dinelli, B. M.; Fabiano, F.; Adriani, A.; Altieri, F.; Moriconi, M. L.; Mura, A.; Sindoni, G.; Filacchione, G.; Tosi, F.; Migliorini, A.; Grassi, D.; Piccioni, G.; Noschese, R.; Cicchetti, A.; Bolton, S. J.; Connerney, J. E. P.; Atreya, S. K.; Bagenal, F.; Gladstone, G. R.; Hansen, C. J.; Kurth, W. S.; Levin, S. M.; Mauk, B. H.; McComas, D. J.; Gérard, Jean-Claude; Turrini, D.; Stefani, S.; Amoroso, M.; Olivieri, A.

doi:10.1002/2017GL072929

Article (Scientific journals)

Preliminary JIRAM results from Juno polar observations: 1. Methodology and analysis applied to the Jovian northern polar region

Dinelli, B. M.; Fabiano, F.; Adriani, A. et al.

2017 • In Geophysical Research Letters, 44 (10), p. 4625-4632

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https://hdl.handle.net/2268/213512

DOI
10.1002/2017GL072929

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Keywords :

H3+; JIRAM; Juno; Jupiter; Earth sciences; Geophysics; Analysis method; Aurora; Complex relationships; High spatial resolution; Jupiters; Spectral region; NASA

Abstract :

[en] During the first orbit around Jupiter of the NASA/Juno mission, the Jovian Auroral Infrared Mapper (JIRAM) instrument observed the auroral regions with a large number of measurements. The measured spectra show both the emission of the H3+ ion and of methane in the 3–4 μm spectral region. In this paper we describe the analysis method developed to retrieve temperature and column density (CD) of the H3+ ion from JIRAM spectra in the northern auroral region. The high spatial resolution of JIRAM shows an asymmetric aurora, with CD and temperature ovals not superimposed and not exactly located where models and previous observations suggested. On the main oval averaged H3+ CDs span between 1.8 × 1012 cm−2 and 2.8 × 1012 cm−2, while the retrieved temperatures show values between 800 and 950 K. JIRAM indicates a complex relationship among H3+ CDs and temperatures on the Jupiter northern aurora. ©2017. American Geophysical Union. All Rights Reserved.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Dinelli, B. M.; ISAC-CNR, Bologna, Italy, IAPS-INAF, Rome, Italy

Fabiano, F.; ISAC-CNR, Bologna, Italy, Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy

Adriani, A.; IAPS-INAF, Rome, Italy

Altieri, F.; IAPS-INAF, Rome, Italy

Moriconi, M. L.; ISAC-CNR, Bologna, Italy, IAPS-INAF, Rome, Italy

Mura, A.; IAPS-INAF, Rome, Italy

Sindoni, G.; IAPS-INAF, Rome, Italy

Filacchione, G.; IAPS-INAF, Rome, Italy

Tosi, F.; IAPS-INAF, Rome, Italy

Migliorini, A.; IAPS-INAF, Rome, Italy

More authors (19 more)

Language :

English

Title :

Preliminary JIRAM results from Juno polar observations: 1. Methodology and analysis applied to the Jovian northern polar region

Publication date :

2017

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Blackwell Publishing Ltd

Volume :

Issue :

Pages :

4625-4632

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

ASI - Agenzia Spaziale Italiana

Available on ORBi :

since 10 August 2017

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