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

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

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)4625-4632
Number of pages8
JournalGeophysical Research Letters
Volume44
Issue number10
DOIs
StatePublished - May 28 2017

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Keywords

  • H3+
  • JIRAM
  • Juno
  • Jupiter
  • aurora

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    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., ... Olivieri, A. (2017). Preliminary JIRAM results from Juno polar observations: 1. Methodology and analysis applied to the Jovian northern polar region. Geophysical Research Letters, 44(10), 4625-4632. https://doi.org/10.1002/2017GL072929