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Herbert F. The Uranian corona as a charge exchange cascade of plasma sheet protons. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92ja02735] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2
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Branduardi-Raymont G, Elsner RF, Galand M, Grodent D, Cravens TE, Ford P, Gladstone GR, Waite JH. Spectral morphology of the X-ray emission from Jupiter's aurorae. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007ja012600] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - R. F. Elsner
- NASA Marshall Space Flight Center; NSSTC/XD12, Space Science Branch; Huntsville Alabama USA
| | - M. Galand
- Imperial College London, Space and Atmospheric Physics Group; Blackett Laboratory; London UK
| | - D. Grodent
- Laboratoire de Physique Atmosphérique et Planétaire, Institut d'Astrophysique et de Géophysique; Université de Liège; Liège Belgium
| | - T. E. Cravens
- Department of Physics and Astronomy; University of Kansas; Lawrence Kansas USA
| | - P. Ford
- Massachusetts Institute of Technology; Kavli Institute for Astrophysics and Space Research; Cambridge Massachusetts USA
| | | | - J. H. Waite
- Southwest Research Institute; San Antonio Texas USA
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3
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Bougher SW. Jupiter Thermospheric General Circulation Model (JTGCM): Global structure and dynamics driven by auroral and Joule heating. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2003je002230] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4
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Mauk BH. Energetic ion characteristics and neutral gas interactions in Jupiter's magnetosphere. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003ja010270] [Citation(s) in RCA: 172] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Gladstone GR, Waite JH, Grodent D, Lewis WS, Crary FJ, Elsner RF, Weisskopf MC, Majeed T, Jahn JM, Bhardwaj A, Clarke JT, Young DT, Dougherty MK, Espinosa SA, Cravens TE. A pulsating auroral X-ray hot spot on Jupiter. Nature 2002; 415:1000-3. [PMID: 11875561 DOI: 10.1038/4151000a] [Citation(s) in RCA: 158] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Jupiter's X-ray aurora has been thought to be excited by energetic sulphur and oxygen ions precipitating from the inner magnetosphere into the planet's polar regions. Here we report high-spatial-resolution observations that demonstrate that most of Jupiter's northern auroral X-rays come from a 'hot spot' located significantly poleward of the latitudes connected to the inner magnetosphere. The hot spot seems to be fixed in magnetic latitude and longitude and occurs in a region where anomalous infrared and ultraviolet emissions have also been observed. We infer from the data that the particles that excite the aurora originate in the outer magnetosphere. The hot spot X-rays pulsate with an approximately 45-min period, a period similar to that reported for high-latitude radio and energetic electron bursts observed by near-Jupiter spacecraft. These results invalidate the idea that jovian auroral X-ray emissions are mainly excited by steady precipitation of energetic heavy ions from the inner magnetosphere. Instead, the X-rays seem to result from currently unexplained processes in the outer magnetosphere that produce highly localized and highly variable emissions over an extremely wide range of wavelengths.
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Affiliation(s)
- G R Gladstone
- Southwest Research Institute, San Antonio, Texas 78228, USA.
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6
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Southwood DJ, Kivelson MG. A new perspective concerning the influence of the solar wind on the Jovian magnetosphere. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000ja000236] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Vasavada AR, Bouchez AH, Ingersoll AP, Little B, Anger CD. Jupiter's visible aurora and Io footprint. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999je001055] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Perry JJ, Kim YH, Fox JL, Porter HS. Chemistry of the Jovian auroral ionosphere. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999je900022] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Ajello J, Shemansky D, Pryor W, Tobiska K, Hord C, Stephens S, Stewart I, Clarke J, Simmons K, McClintock W, Barth C, Gebben J, Miller D, Sandel B. Galileo orbiter ultraviolet observations of Jupiter aurora. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98je00832] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Gladstone GR, Waite JH, Lewis WS. Secular and local time dependence of Jovian X ray emissions. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98je00737] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Connerney JEP, Acuña MH, Ness NF, Satoh T. New models of Jupiter's magnetic field constrained by the Io flux tube footprint. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/97ja03726] [Citation(s) in RCA: 339] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Prangé R, Maurice S, Harris WM, Rego D, Livengood T. Comparison of IUE and HST diagnostics of the Jovian Aurorae. ACTA ACUST UNITED AC 1997. [DOI: 10.1029/96je03304] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Tsurutani BT, Arballo JK, Goldstein BE, Ho CM, Lakhina GS, Smith EJ, Cornilleau-Wehrlin N, Prangé R, Lin N, Kellogg P, Phillips JL, Balogh A, Krupp N, Kane M. Plasma wave characteristics of the Jovian magnetopause boundary layer: Relationship to the Jovian aurora? ACTA ACUST UNITED AC 1997. [DOI: 10.1029/96ja02785] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Mauk BH, Gary SA, Kane M, Keath EP, Krimigis SM, Armstrong TP. Hot plasma parameters of Jupiter's inner magnetosphere. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96ja00006] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Grodent D, Dols V, Gérard JC, Rego D. The equatorial boundary of the ultraviolet Jovian north aurora observed with multispectral Hubble Space Telescope images. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/95je03259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Waite JH, Gladstone GR, Franke K, Lewis WS, Fabian AC, Brandt WN, Na C, Haberl F, Clarke JT, Hurley KC, Sommer M, Bolton S. ROSAT Observations of X-ray Emissions from Jupiter During the Impact of Comet Shoemaker-Levy 9. Science 1995; 268:1598-601. [PMID: 17754612 DOI: 10.1126/science.268.5217.1598] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Röntgensatellit (ROSAT) observations made shortly before and during the collision of comet Shoemaker-Levy 9 with Jupiter show enhanced x-ray emissions from the planet's northern high latitudes. These emissions, which occur at System III longitudes where intensity enhancements have previously been observed in Jupiter's ultraviolet aurora, appear to be associated with the comet fragment impacts in Jupiter's southern hemisphere and may represent brightenings of the jovian x-ray aurora caused either by the fragment impacts themselves or by the passage of the fragments and associated dust clouds through Jupiter's inner magnetosphere.
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Prangé R, Rego D, Gérard JC. Auroral Lyman α and H2bands from the giant planets: 2. Effect of the anisotropy of the precipitating particles on the interpretation of the “color ratio”. ACTA ACUST UNITED AC 1995. [DOI: 10.1029/94je03176] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Gérard JC, Grodent D, Dols V, Prangé R, Waite JH, Gladstone GR, Franke KA, Paresce F, Storrs A, Jaffel LB. A Remarkable Auroral Event on Jupiter Observed in the Ultraviolet with the Hubble Space Telescope. Science 1994; 266:1675-8. [PMID: 17775626 DOI: 10.1126/science.266.5191.1675] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Two sets of ultraviolet images of the Jovian north aurora were obtained with the Faint Object Camera on board the Hubble Space Telescope. The first series shows an intense discrete arc in near corotation with the planet. The maximum apparent molecular hydrogen emission rate corresponds to an electron precipitation of approximately 1 watt per square meter, which is about 30,000 times larger than the solar heating by extreme ultraviolet radiation. Such a particle heating rate of the auroral upper atmosphere of Jupiter should cause a large transient temperature increase and generate strong thermospheric winds. Twenty hours after initial observation, the discrete arc had decreased in brightness by more than one order of magnitude. The time scale and magnitude of the change in the ultraviolet aurora leads us to suggest that the discrete Jovian auroral precipitation is related to large-scale variations in the current system, as is the case for Earth's discrete aurorae.
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Herbert F, Sandel BR. The Uranian aurora and its relationship to the magnetosphere. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/93ja02673] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Waite JH, Bagenal F, Seward F, Na C, Gladstone GR, Cravens TE, Hurley KC, Clarke JT, Elsner R, Stern SA. ROSAT observations of the Jupiter aurora. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/94ja01005] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Drossart P, Bézard B, Atreya SK, Bishop J, Waite JH, Boice D. Thermal profiles in the auroral regions of Jupiter. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93je01801] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Prangé R, Zarka P, Ballester GE, Livengood TA, Denis L, Carr T, Reyes F, Bame SJ, Moos HW. Correlated variations of UV and radio emissions during an outstanding Jovian auroral event. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93je01802] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Gérard JC, Dols V, Paresce F, Prangé R. Morphology and time variation of the Jovian far UV aurora: Hubble space telescope observations. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93je01334] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Singhal RP, Chakravarty SC, Bhardwaj A, Prasad B. Energetic electron precipitation in Jupiter's upper atmosphere. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/92je01894] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Baron R, Joseph RD, Owen T, Tennyson J, Miller S, Ballester GE. Imaging Jupiter's aurorae from H3+ emissions in the 3-4 micrometers band. Nature 1991; 353:539-42. [PMID: 11538254 DOI: 10.1038/353539a0] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Since H3+ was first spectroscopically detected on Jupiter, there has been considerable interest in using this simple molecular ion to probe conditions existing in the planet's auroral regions. Here we present a series of images of Jupiter recorded at wavelengths sensitive to emission by H3+, which reveal the spatial distribution of excited H3+ molecular ions in the jovian ionosphere, as seen from Earth. We believe that they provide high-spatial-resolution images of polar aurorae on Jupiter. They suggest that the intensity of the auroral emission can vary on a timescale of an hour, a shorter period than had previously been noted. We also find that the spatial distribution of H3+ emissions correlates only partially with the loci of auroral activity inferred from ultraviolet and longer-wavelength infrared observations. The H3+ emission may therefore be controlled by auroral processes that are different from those responsible for the ultraviolet and infrared emissions.
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Affiliation(s)
- R Baron
- Institute for Astronomy, University of Hawaii, Honolulu 96822, USA
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27
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Prangé R, Elkhamsi M. Modeling the precipitation flux in the Jovian auroral zones: 1. The model and its application to the UV auroral emissions. ACTA ACUST UNITED AC 1991. [DOI: 10.1029/91ja01492] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Livengood TA, Strobel DF, Moos HW. Long-term study of longitudinal dependence in primary particle precipitation in the north Jovian aurora. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/ja095ia07p10375] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Waite JH, Clarke JT, Cravens TE, Hammond CM. The Jovian aurora: Electron or ion precipitation? ACTA ACUST UNITED AC 1988. [DOI: 10.1029/ja093ia07p07244] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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