The Statistical Morphology of Saturn’s Equatorial Energetic Neutral Atom Emission

J. Kinrade; A. Bader; S. V. Badman; C. Paranicas; D. G. Mitchell; D. Constable; C. S. Arridge; S. W.H. Cowley; G. Provan

doi:10.1029/2020GL091595

The Statistical Morphology of Saturn’s Equatorial Energetic Neutral Atom Emission

J. Kinrade
, A. Bader
, S. V. Badman
, C. Paranicas
, D. G. Mitchell
, D. Constable
, C. S. Arridge
, S. W.H. Cowley
, G. Provan

UHI Inverness

نتاج البحث: Article › مراجعة النظراء

4 اقتباسات (Scopus)

ملخص

Saturn’s magnetosphere is an efficient emitter of energetic neutral atoms (ENAs), created through charge exchange of energetic ions with the extended neutral cloud originating from the icy moon Enceladus. We present an analysis using the complete image set captured by Cassini’s Ion Neutral Camera to characterize Saturn’s average ENA morphology. Concentric tori are formed around the planet by oxygen and hydrogen ENAs, with intensity peaks between 7 and 10 R_S radial distance, with a ∼1–2 R_S dayside offset. Nightside intensity is brighter than the dayside, likely the result of enhancements following large-scale plasma injections from the magnetotail, and influence of the noon-midnight electric field. Global intensity is clearly modulated with the near-planetary rotation period. This Cassini-era profile of Saturn’s ENA emission advances our understanding of how volcanic moons can influence plasma dynamics in giant magnetospheres and is timely ahead of the planned JUICE mission, which carries the first dedicated ENA detector to Jupiter.

اللغة الأصلية	English
رقم المقال	e2020GL091595
دورية	Geophysical Research Letters
مستوى الصوت	48
رقم الإصدار	11
المعرِّفات الرقمية للأشياء	https://doi.org/10.1029/2020GL091595
حالة النشر	Published - 16 يونيو 2021

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10.1029/2020GL091595

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@article{4b7116b594e54b48b705961078d914a2,

title = "The Statistical Morphology of Saturn{\textquoteright}s Equatorial Energetic Neutral Atom Emission",

abstract = "Saturn{\textquoteright}s magnetosphere is an efficient emitter of energetic neutral atoms (ENAs), created through charge exchange of energetic ions with the extended neutral cloud originating from the icy moon Enceladus. We present an analysis using the complete image set captured by Cassini{\textquoteright}s Ion Neutral Camera to characterize Saturn{\textquoteright}s average ENA morphology. Concentric tori are formed around the planet by oxygen and hydrogen ENAs, with intensity peaks between 7 and 10 RS radial distance, with a ∼1–2 RS dayside offset. Nightside intensity is brighter than the dayside, likely the result of enhancements following large-scale plasma injections from the magnetotail, and influence of the noon-midnight electric field. Global intensity is clearly modulated with the near-planetary rotation period. This Cassini-era profile of Saturn{\textquoteright}s ENA emission advances our understanding of how volcanic moons can influence plasma dynamics in giant magnetospheres and is timely ahead of the planned JUICE mission, which carries the first dedicated ENA detector to Jupiter.",

keywords = "Cassini INCA, energetic neutral atoms, Saturn{\textquoteright}s magnetosphere",

author = "J. Kinrade and A. Bader and Badman, \{S. V.\} and C. Paranicas and Mitchell, \{D. G.\} and D. Constable and Arridge, \{C. S.\} and Cowley, \{S. W.H.\} and G. Provan",

note = "Funding Information: Cassini operations are supported by NASA (managed by the Jet Propulsion Laboratory) and the European Space Agency (ESA). The authors extend their thanks to all members of the Cassini MIMI team for their hard work. J. Kinrade, S. V. Badman, and D. Constable were supported by STFC grant ST/R000816/1. S. V. Badman was also supported by an STFC Ernest Rutherford Fellowship ST/M005534/1. A. Bader was funded by a Lancaster University FST studentship. C. Paranicas would like to acknowledge grants 80NSSC19K0886 and NNX16AI46G between NASA and the Johns Hopkins University. C. S. Arridge was supported by a Royal Society Research Fellowship (UF110442) and STFC grant ST/R000816/1. Work at Leicester by SWHC and GP was supported by STFC Consolidated Grant ST/N000749/1. Computations for this study were performed using the High End Computing facility at Lancaster University. Publisher Copyright: {\textcopyright} 2021. The Authors.",

year = "2021",

month = jun,

day = "16",

doi = "10.1029/2020GL091595",

language = "English",

volume = "48",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley and Sons Inc.",

number = "11",

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T1 - The Statistical Morphology of Saturn’s Equatorial Energetic Neutral Atom Emission

AU - Kinrade, J.

AU - Bader, A.

AU - Badman, S. V.

AU - Paranicas, C.

AU - Mitchell, D. G.

AU - Constable, D.

AU - Arridge, C. S.

AU - Cowley, S. W.H.

AU - Provan, G.

N1 - Funding Information: Cassini operations are supported by NASA (managed by the Jet Propulsion Laboratory) and the European Space Agency (ESA). The authors extend their thanks to all members of the Cassini MIMI team for their hard work. J. Kinrade, S. V. Badman, and D. Constable were supported by STFC grant ST/R000816/1. S. V. Badman was also supported by an STFC Ernest Rutherford Fellowship ST/M005534/1. A. Bader was funded by a Lancaster University FST studentship. C. Paranicas would like to acknowledge grants 80NSSC19K0886 and NNX16AI46G between NASA and the Johns Hopkins University. C. S. Arridge was supported by a Royal Society Research Fellowship (UF110442) and STFC grant ST/R000816/1. Work at Leicester by SWHC and GP was supported by STFC Consolidated Grant ST/N000749/1. Computations for this study were performed using the High End Computing facility at Lancaster University. Publisher Copyright: © 2021. The Authors.

PY - 2021/6/16

Y1 - 2021/6/16

N2 - Saturn’s magnetosphere is an efficient emitter of energetic neutral atoms (ENAs), created through charge exchange of energetic ions with the extended neutral cloud originating from the icy moon Enceladus. We present an analysis using the complete image set captured by Cassini’s Ion Neutral Camera to characterize Saturn’s average ENA morphology. Concentric tori are formed around the planet by oxygen and hydrogen ENAs, with intensity peaks between 7 and 10 RS radial distance, with a ∼1–2 RS dayside offset. Nightside intensity is brighter than the dayside, likely the result of enhancements following large-scale plasma injections from the magnetotail, and influence of the noon-midnight electric field. Global intensity is clearly modulated with the near-planetary rotation period. This Cassini-era profile of Saturn’s ENA emission advances our understanding of how volcanic moons can influence plasma dynamics in giant magnetospheres and is timely ahead of the planned JUICE mission, which carries the first dedicated ENA detector to Jupiter.

AB - Saturn’s magnetosphere is an efficient emitter of energetic neutral atoms (ENAs), created through charge exchange of energetic ions with the extended neutral cloud originating from the icy moon Enceladus. We present an analysis using the complete image set captured by Cassini’s Ion Neutral Camera to characterize Saturn’s average ENA morphology. Concentric tori are formed around the planet by oxygen and hydrogen ENAs, with intensity peaks between 7 and 10 RS radial distance, with a ∼1–2 RS dayside offset. Nightside intensity is brighter than the dayside, likely the result of enhancements following large-scale plasma injections from the magnetotail, and influence of the noon-midnight electric field. Global intensity is clearly modulated with the near-planetary rotation period. This Cassini-era profile of Saturn’s ENA emission advances our understanding of how volcanic moons can influence plasma dynamics in giant magnetospheres and is timely ahead of the planned JUICE mission, which carries the first dedicated ENA detector to Jupiter.

KW - Cassini INCA

KW - energetic neutral atoms

KW - Saturn’s magnetosphere

UR - https://www.scopus.com/pages/publications/85107658106

UR - https://www.scopus.com/pages/publications/85107658106#tab=citedBy

U2 - 10.1029/2020GL091595

DO - 10.1029/2020GL091595

M3 - Article

AN - SCOPUS:85107658106

SN - 0094-8276

VL - 48

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 11

M1 - e2020GL091595

ER -

The Statistical Morphology of Saturn’s Equatorial Energetic Neutral Atom Emission

ملخص

أهداف الأمم المتحدة للتنمية المستدامة

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الملفات والروابط الأخرى

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