Johnson, RE;
Stallard, TS;
Melin, H;
Miller, S;
Nichols, JD;
(2016)
Measurements of the rotation rate of the jovian mid-to-low latitude ionosphere.
ICARUS
, 280
pp. 249-254.
10.1016/j.icarus.2016.06.026.
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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 View the MathML source line at 3.953 μ m using the IRTF, the line-of-sight velocities of the View the MathML source ions were derived in the planetary reference frame and found to be 0.091 ± View the MathML source, 0.0082 ± View the MathML source and 0.31 ± View the MathML sourcein 1998, 2007 and 2013 respectively. These zero velocities represent corotation at the mid-to-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 View the MathML source emission layer (∼550 km above the 1 bar level), and we assert that the View the MathML source ions in Jupiter's mid-to-low latitude are rigidly corotating.
Type: | Article |
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Title: | Measurements of the rotation rate of the jovian mid-to-low latitude ionosphere |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1016/j.icarus.2016.06.026 |
Publisher version: | http://dx.doi.org/10.1016/j.icarus.2016.06.026 |
Language: | English |
Additional information: | © 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/). |
Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Jupiter, atmospheres, Ionosphere, Infrared observations, Spectroscopy, LYMAN-ALPHA-EMISSION, JUPITERS THERMOSPHERE, UPPER-ATMOSPHERE, H-3(+) EMISSION, AURORAL OVAL, DYNAMICS, MAGNETOSPHERE, PROFILE, MODEL |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Science and Technology Studies |
URI: | https://discovery.ucl.ac.uk/id/eprint/1526821 |
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