Article (Scientific journals)
Possible Transient Luminous Events Observed in Jupiter's Upper Atmosphere
Giles, Rohini S.; Greathouse, Thomas K.; Bonfond, Bertrand et al.
2020In Journal of Geophysical Research. Planets, 125 (11), p. 2020JE006659
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Keywords :
Jupiter; Ultraviolet; Lightning; Spectroscopy
Abstract :
[en] Abstract Eleven transient bright flashes were detected in Jupiter's atmosphere using the ultraviolet spectrograph instrument on the Juno spacecraft. These bright flashes are only observed in a single spin of the spacecraft and their brightness decays exponentially with time, with a duration of ∼1.4 ms. The spectra are dominated by H2 Lyman band emission and based on the level of atmospheric absorption, we estimate a source altitude of 260 km above the 1-bar level. Based on these characteristics, we suggest that these are observations of transient luminous events (TLEs) in Jupiter's upper atmosphere. In particular, we suggest that these are elves, sprites or sprite halos, three types of TLEs that occur in the Earth's upper atmosphere in response to tropospheric lightning strikes. This is supported by visible light imaging, which shows cloud features typical of lightning source regions at the locations of several of the bright flashes. TLEs have previously only been observed on Earth, although theoretical and experimental work has predicted that they should also be present on Jupiter.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Giles, Rohini S.
Greathouse, Thomas K.
Bonfond, Bertrand  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gladstone, G. Randall
Kammer, Joshua A.
Hue, Vincent
Grodent, Denis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Versteeg, Maarten H.
Wong, Michael H.
Bolton, Scott J.
Connerney, John E. P.
Levin, Steven M.
More authors (3 more) Less
Language :
English
Title :
Possible Transient Luminous Events Observed in Jupiter's Upper Atmosphere
Publication date :
2020
Journal title :
Journal of Geophysical Research. Planets
ISSN :
2169-9097
eISSN :
2169-9100
Publisher :
Wiley, Hoboken, United States - New Jersey
Volume :
125
Issue :
11
Pages :
e2020JE006659
Peer reviewed :
Peer reviewed
Commentary :
e2020JE006659 2020JE006659
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