Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/38875
Title: Measurements of the rotation rate of the jovian mid-to-low latitude ionosphere
Authors: Johnson, Rosie E.
Stallard, Tom S.
Melin, Henrik
Miller, S.
Nichols, Jonathan D.
First Published: 9-Jul-2016
Publisher: Elsevier for Academic Press
Citation: Icarus, 2016, 280, pp. 249-254 (6)
Abstract: Previous studies of Jupiter’s upper atmosphere often assume that the mid-to-low latitude ionosphere is corotating, but a model describing an observed asymmetry in hydrogen Lyman-α emission (∼1000 km above the 1 bar level) disagrees with this assumption. From measurements of the Doppler shifted H+ 3 ν2 Q(1, 0−) line at 3.953 μm using the IRTF, the line-of-sight velocities of the H+ 3 ions were derived in the planetary reference frame and found to be 0.091 ± 0.25 km s−1, 0.0082 ± 0.30 km s−1 and 0.31 ± 0.51 km s−1 in 1998, 2007 and 2013 respectively. These zero velocities represent corotation at the midto-low latitude region of Jupiter’s ionosphere. There is no evidence of flows associated with the hydrogen Lyman-α emission asymmetries detected in the peak H+ 3 emission layer (∼550 km above the 1 bar level), and we assert that the H+ 3 ions in Jupiter’s mid-to-low latitude are rigidly corotating.
DOI Link: 10.1016/j.icarus.2016.06.026
ISSN: 0019-1035
Links: http://www.sciencedirect.com/science/article/pii/S0019103516303517
http://hdl.handle.net/2381/38875
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: © 2016 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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