Enhanced C2H2 Absorption Within Jupiter's Southern Auroral Oval From Juno UVS Observations

Geophysics; Geochemistry and Petrology; Earth and Planetary Sciences (miscellaneous); Space and Planetary Science; astro-ph.EP; Physics - Space Physics

Abstract :

[en] Reflected sunlight observations from the Ultraviolet Spectrograph (UVS) on the Juno spacecraft were used to study the distribution of acetylene (C2H2) at Jupiter's south pole. We find that the shape of the C2H2 absorption feature varies significantly across the polar region, and this can be used to infer spatial variability in the C2H2 abundance. There is a localized region of enhanced C2H2 absorption which coincides with the location of Jupiter's southern polar aurora; the C2H2 abundance poleward of the auroral oval is a factor of 3 higher than adjacent quiescent, non-auroral longitudes. This builds on previous infrared studies, which found enhanced C2H2 abundances within the northern auroral oval. This suggests that Jupiter's upper-atmosphere chemistry is being strongly influenced by the influx of charged auroral particles and demonstrates the necessity of developing ion-neutral photochemical models of Jupiter's polar regions.

Research Center/Unit :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Giles, Rohini S. ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States

Hue, Vincent ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States ; Aix-Marseille Université, CNRS, CNES, Institut Origines, LAM, Marseille, France

Greathouse, Thomas K. ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States

Gladstone, G. Randall ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States ; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, United States

Kammer, Joshua A. ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States

Versteeg, Maarten H. ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States

Bonfond, Bertrand ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Grodent, Denis ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Sinclair, James A. ; Jet Propulsion Laboratory, Pasadena, United States

Bolton, Scott J. ; Space Science and Engineering Division, Southwest Research Institute, San Antonio, United States

Levin, Steven M. ; Jet Propulsion Laboratory, Pasadena, United States

Language :

English

Title :

Enhanced C2H2 Absorption Within Jupiter's Southern Auroral Oval From Juno UVS Observations

Publication date :

February 2023

Journal title :

Journal of Geophysical Research. Planets

ISSN :

2169-9097

eISSN :

2169-9100

Publisher :

John Wiley and Sons Inc

Volume :

128

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022JE007610

Funders :

NASA - National Aeronautics and Space Administration
F.R.S.-FNRS - Fonds de la Recherche Scientifique

Funding text :

The authors are grateful to the NASA and contributing institutions, which have made the Juno mission possible. This work was funded by the NASA's New Frontiers Program for Juno via contract with the Southwest Research Institute. BB is a Research Associate of the Fonds de la Recherche Scientifique – FNRS.The authors are grateful to the NASA and contributing institutions, which have made the Juno mission possible. This work was funded by the NASA's New Frontiers Program for Juno via contract with the Southwest Research Institute. BB is a Research Associate of the Fonds de la Recherche Scientifique – FNRS.

Available on ORBi :

since 23 March 2023

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