Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Preliminary JIRAM results from Juno polar observations: 1. Methodology and analysis applied to the Jovian northern polar region
Ist Teil von
Geophysical research letters, 2017-05, Vol.44 (10), p.4625-4632
Ort / Verlag
Washington: John Wiley & Sons, Inc
Erscheinungsjahr
2017
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
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.
Key Points
First global maps of
H3+ intensity, column density, and temperature for the Jupiter northern aurora with high spatial resolution
One side of the auroral oval shows higher
H3+ column density and lower temperatures in comparison with the other side
Column densities main oval and temperature main oval do not superimpose