Universität zu Köln

Clark, G., Mauk, B. H., Haggerty, D., Paranicas, C., Kollmann, P., Rymer, A., Bunce, E. J., Cowley, S. W. H., Mitchell, D. G., Provan, G., Ebert, R. W., Allegrini, F., Bagenal, F., Bolton, S., Connerney, J., Kotsiaros, S., Kurth, W. S., Levin, S., McComas, D. J., Saur, J. and Valek, P. (2017). Energetic particle signatures of magnetic field-aligned potentials over Jupiter's polar regions. Geophys. Res. Lett., 44 (17). S. 8703 - 8712. WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 1944-8007

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Abstract

Recent results of the first ever orbit through Jupiter's auroral region by NASA's Juno spacecraft did not show evidence of coherent acceleration in the auroral or polar region. However, in this letter, we show energetic particle data from Juno's Jupiter Energetic-particle Detector Instrument instrument during the third auroral pass that exhibits conclusive evidence of downward parallel electric fields in portions of Jupiter's polar region. The energetic particle distributions show inverted-V ion and electron structures in a downward electric current region with accelerated peaked distributions in hundreds of keV to similar to 1MeV range. The origin of these large electric potential structures is investigated and discussed within the current theoretical framework of current-voltage relationships at both Earth and Jupiter. Parallel electric fields responsible for accelerating particles to maintain the aurora/magnetospheric circuit appear to be a common phenomenon among strongly magnetized planets with conducting ionospheres; however, their origin and generation mechanisms are subjects of ongoing research.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Clark, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mauk, B. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haggerty, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paranicas, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kollmann, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rymer, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bunce, E. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cowley, S. W. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mitchell, D. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Provan, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ebert, R. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Allegrini, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bagenal, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bolton, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Connerney, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kotsiaros, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kurth, W. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Levin, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED McComas, D. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Saur, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Valek, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-217628
DOI:	10.1002/2017GL074366
Journal or Publication Title:	Geophys. Res. Lett.
Volume:	44
Number:	17
Page Range:	S. 8703 - 8712
Date:	2017
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	1944-8007
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PARALLEL ELECTRIC-FIELDS; AURORAL CURRENT REGION; X-RAY-EMISSION; BIRKELAND CURRENTS; MAGNETOSPHERE; IONOSPHERE; BEAMS; COROTATION; FLUX Multiple languages Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21762