Preliminary results on the composition of Jupiter's troposphere in hot spot regions from the JIRAM/Juno instrument

The Jupiter InfraRed Auroral Mapper (JIRAM) aboard Juno observed the Jovian South Pole aurora during the first orbit of the mission. H 3+ (trihydrogen cation) and CH 4 (methane) emissions have been identified and measured. The observations have been carried out in nadir and slant viewing both by a L...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: D. Grassi, A. Adriani, A. Mura, B. M. Dinelli, G. Sindoni, D. Turrini, G. Filacchione, A. Migliorini, M. L. Moriconi, F. Tosi, R. Noschese, A. Cicchetti, F. Altieri, F. Fabiano, G. Piccioni, S. Stefani, S. Atreya, J. Lunine, G. Orton, A. Ingersoll, S. Bolton, S. Levin, J. Connerney, A. Olivieri, M. Amoroso
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Jupiter aurora h3+ Jiram Juno infrared
Jupiter
South Pole
South pole
Online Access:http://hdl.handle.net/11585/630571
https://doi.org/10.1002/2017gl072841
Description
Summary:The Jupiter InfraRed Auroral Mapper (JIRAM) aboard Juno observed the Jovian South Pole aurora during the first orbit of the mission. H 3+ (trihydrogen cation) and CH 4 (methane) emissions have been identified and measured. The observations have been carried out in nadir and slant viewing both by a L-filtered imager and a 2–5 μm spectrometer. Results from the spectral analysis of the all observations taken over the South Pole by the instrument are reported. The coverage of the southern aurora during these measurements has been partial, but sufficient to determine different regions of temperature and abundance of the H 3+ ion from its emission lines in the 3–4 μm wavelength range. Finally, the results from the southern aurora are also compared with those from the northern ones from the data taken during the same perijove pass and reported by Dinelli et al. (2017).

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