Journal article
Preliminary JIRAM results from Juno polar observations: 3. Evidence of diffuse methane presence in the Jupiter auroral regions: CH 4 Emission in Jupiter Auroral Regions
Geophysical research letters, Vol.44(10), pp.4641-4648
05/28/2017
DOI: 10.1002/2017GL073592
Abstract
Throughout the first orbit of the NASA Juno mission around Jupiter, the Jupiter InfraRed Auroral Mapper (JIRAM) targeted the northern and southern polar regions several times. The analyses of the acquired images and spectra confirmed a significant presence of methane (CH4) near both poles through its 3.3 μm emission overlapping the H3+ auroral feature at 3.31 μm. Neither acetylene (C2H2) nor ethane (C2H6) have been observed so far. The analysis method, developed for the retrieval of H3+ temperature and abundances and applied to the JIRAM-measured spectra, has enabled an estimate of the effective temperature for methane peak emission and the distribution of its spectral contribution in the polar regions. The enhanced methane inside the auroral oval regions in the two hemispheres at different longitude suggests an excitation mechanism driven by energized particle precipitation from the magnetosphere.
Details
- Title: Subtitle
- Preliminary JIRAM results from Juno polar observations: 3. Evidence of diffuse methane presence in the Jupiter auroral regions: CH 4 Emission in Jupiter Auroral Regions
- Creators
- M. L. Moriconi - Institute for Space Astrophysics and PlanetologyA. Adriani - Institute for Space Astrophysics and PlanetologyB. M. Dinelli - Institute for Space Astrophysics and PlanetologyF. Fabiano - Institute of Atmospheric Sciences and ClimateF. Altieri - Institute for Space Astrophysics and PlanetologyF. Tosi - Institute for Space Astrophysics and PlanetologyG. Filacchione - Institute for Space Astrophysics and PlanetologyA. Migliorini - Institute for Space Astrophysics and PlanetologyJ. C. Gérard - University of LiègeA. Mura - Institute for Space Astrophysics and PlanetologyD. Grassi - Institute for Space Astrophysics and PlanetologyG. Sindoni - Institute for Space Astrophysics and PlanetologyG. Piccioni - Institute for Space Astrophysics and PlanetologyR. Noschese - Institute for Space Astrophysics and PlanetologyA. Cicchetti - Institute for Space Astrophysics and PlanetologyS. J. Bolton - Southwest Research InstituteJ. E. P. Connerney - Goddard Space Flight CenterS. K. Atreya - University of MichiganF. Bagenal - University of Colorado SystemG. R. Gladstone - Southwest Research InstituteC. Hansen - Planetary Science InstituteW. S. Kurth - Jet Propulsion LaboratoryS. M. Levin - University of IowaB. H. Mauk - Johns Hopkins University Applied Physics LaboratoryD. J. McComas - Princeton UniversityD. Turrini - University of AtacamaS. Stefani - Institute for Space Astrophysics and PlanetologyA. Olivieri - Agenzia Spaziale ItalianaM. Amoroso - Agenzia Spaziale Italiana
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.44(10), pp.4641-4648
- DOI
- 10.1002/2017GL073592
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Grant note
- DOI: 10.13039/501100003981, name: Agenzia Spaziale Italiana, award: 2016‐23‐H.0.
- Language
- English
- Date published
- 05/28/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455544902771
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