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Location of Saturn's northern infrared aurora determined from Cassini VIMS images
Open accessAbstract
[1] The location of Saturn's northern infrared aurora is described in detail using 12 selected images acquired by Cassini VIMS during 2006–2008. Bright main oval arcs and prevalent polar features are displayed, which do not exhibit a preferred local time or spatial extent. The average equatorward limit of the aurora was determined using a best fit circle method. The average circle has a radius of 16.4 ± 0.2° latitude, centred 1.6° anti-sunward of Saturn's pole. The low standard deviation of the fitted circle radii (<1°) indicates the relative stability of the equatorward auroral boundary. For the first time we show that the average location of the infrared oval is similar to that of the ultraviolet oval, suggesting that the auroral emissions at different wavelengths are very likely produced by a common driver despite the distinct emission mechanisms.
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Saturn's main auroral oval occurs at an average latitude of 76.5°N and completely encompasses the area of the NPSV, sitting ~1° south of the hexagon latitude (78°N).
“Saturn’s main auroral oval, associated with the boundary between open and closed magnetic field lines, occurs at an average latitude of 76.5°N 55 and therefore completely encompasses the area of the NPSV, sitting ~1° south of the hexagon latitude (78°N).”
From A hexagon in Saturn's northern stratosphere surrounding the emerging summertime polar vortex (2018) · cites this paper as [55]
The Boundary Determination and Fitting section (§3, paragraph 12) gives the average oval a radius of 16.4° from a centre offset 1.6° from the pole, not an average latitude of 76.5°N. The Introduction associates the main oval with the open–closed field-line boundary, but that does not support the cited latitude. The NPSV and hexagon comparison is the citing authors’ inference, not a finding attributed to this source. (LLM, conf=0.88)
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Extreme Ultraviolet Observations from Voyager 1 Encounter with Jupiter
Broadfoot, A. L., Belton, M. J. S., Takacs, P. Z., Sandel, B. R., Shemansky, D. E., Holberg, J. B., Ajello, J. M., Atreya, S. K., DONAHUE, T. M., Moos, H. W., et al. (1979) · Science · doi:10.1126/science.204.4396.979 · Cited by 761
Extreme Ultraviolet Observations from Voyager 1 Encounter with Saturn
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The Cassini Visual And Infrared Mapping Spectrometer (Vims) Investigation
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Self-citationDrossart, P., Maillard, J. P., Caldwell, J., et al. (1989) · Nature · doi:10.1038/340539a0 · Cited by 352
Cassini Magnetometer Observations During Saturn Orbit Insertion
Dougherty, M. K., Achilleos, N., André, N., et al. (2005) · Science · doi:10.1126/science.1106098 · Cited by 224
Self-citationA simple quantitative model of plasma flows and currents in Saturn's polar ionosphere
Cowley, S. W. H., Bunce, E. J., & O'Rourke, J. M. (2004) · Journal of Geophysical Research Atmospheres · doi:10.1029/2003ja010375 · Cited by 160
Self-citationMorphological differences between Saturn's ultraviolet aurorae and those of Earth and Jupiter
Clarke, J. T., Gérard, J., Grodent, D. C., et al. (2005) · Nature · doi:10.1038/nature03331 · Cited by 154
Origin of Saturn's aurora: Simultaneous observations by Cassini and the Hubble Space Telescope
Bunce, E. J., Arridge, C. S., Clarke, J. T., et al. (2008) · Journal of Geophysical Research Atmospheres · doi:10.1029/2008ja013257 · Cited by 143
Self-citationSolar wind dynamic pressure and electric field as the main factors controlling Saturn's aurorae
Crary, F. J., Clarke, J. T., Dougherty, M. K., et al. (2005) · Nature · doi:10.1038/nature03333 · Cited by 129
Self-citationBunce, E. J., Arridge, C. S., Cowley, S. W. H., et al. (2008) · Journal of Geophysical Research Atmospheres · doi:10.1029/2007ja012538 · Cited by 111
Self-citationBadman, S. V., Bunce, E. J., Clarke, J. T., et al. (2005) · Journal of Geophysical Research Atmospheres · doi:10.1029/2005ja011240 · Cited by 97
Self-citationOscillation of Saturn's southern auroral oval
Nichols, J. D., Clarke, J. T., Cowley, S. W. H., et al. (2008) · Journal of Geophysical Research Atmospheres · doi:10.1029/2008ja013444 · Cited by 92
Self-citationA statistical analysis of the location and width of Saturn's southern auroras
Badman, S. V., Cowley, S. W. H., Gérard, J., et al. (2006) · Annales Geophysicae · doi:10.5194/angeo-24-3533-2006 · Cited by 92
Self-citationGérard, J., Bonfond, B., Gustin, J., Grodent, D. C., Clarke, J. T., Бисикало, Д. В., & Shematovich, V. I. (2009) · Geophysical Research Letters · doi:10.1029/2008gl036554 · Cited by 91
Variation of Saturn's UV aurora with SKR phase
Nichols, J. D., Cecconi, B., Clarke, J. T., et al. (2010) · Geophysical Research Letters · doi:10.1029/2010gl044057 · Cited by 63
Self-citationComplex structure within Saturn’s infrared aurora
Stallard, T., Miller, S. D., Lystrup, M., et al. (2008) · Nature · doi:10.1038/nature07440 · Cited by 49
Self-citationNichols, J. D., Badman, S. V., Bunce, E. J., et al. (2009) · Geophysical Research Letters · doi:10.1029/2009gl041491 · Cited by 47
Self-citationSaturn's auroral/polar H+3 infrared emission
Stallard, T., Miller, S. D., Melin, H., et al. (2007) · Icarus · doi:10.1016/j.icarus.2006.12.027 · Cited by 44
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A hexagon in Saturn's northern stratosphere surrounding the emerging summertime polar vortex
Fletcher, L. N., Orton, G. S., Sinclair, J. A., Guerlet, S., Read, P. L., Antuñano, A., Achterberg, R. K., Flasar, F. M., Irwin, P. G. J., Bjoraker, G. L., et al. (2018) · Nature Communications · doi:10.1038/s41467-018-06017-3 · Cited by 52
Metadata
- Authors
- Badman, S. V., Achilleos, N., Baines, K. H., Brown, R. H., Bunce, E. J., Dougherty, M. K., Melin, H., Nichols, J. D., & Stallard, T.
- Affiliations
- Japan Aerospace Exploration Agency (JP)
- University College London (GB)
- University of Wisconsin–Madison (US)
- University of Arizona (US)
- University of Leicester (GB)
- Imperial College London (GB)
- ORCID
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2011-02
- Volume
- 38
- Issue
- 3
- Pages
- n/a-n/a
- ISSN
- 0094-8276 (ISSN-L)
- OpenAlex
- W1572080249
- Cited by
- 33
- References
- 18
- Citations by year
- 2026: 1 · 2020: 2 · 2019: 4 · 2018: 5 · 2016: 2 · 2015: 5 · 2014: 3 · 2013: 3 · 2012: 4
- FWCI
- 2.38
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Geophysical Research Letters (publishedVersion)
- Leicester Research Archive (University of Leicester) (submittedVersion)
- Funders
- Science and Technology Facilities Council (PP/E001076/1, ST/G002223/1, ST/H001972/1, ST/H002480/1)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Ionosphere and magnetosphere dynamics
- Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Lightning and Electromagnetic Phenomena
- Keywords
- Saturn, auroral oval, Cassini VIMS, ultraviolet aurora
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