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Sittler EC, Ogilvie KW, Scudder JD. Survey of low-energy plasma electrons in Saturn's magnetosphere: Voyagers 1 and 2. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja088ia11p08847] [Citation(s) in RCA: 201] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sittler EC, Johnson RE, Smith HT, Richardson JD, Jurac S, Moore M, Cooper JF, Mauk BH, Michael M, Paranicas C, Armstrong TP, Tsurutani B. Energetic nitrogen ions within the inner magnetosphere of Saturn. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2004ja010509] [Citation(s) in RCA: 16] [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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Sittler EC, Blanc MF, Richardson JD. Proposed model for Saturn's auroral response to the solar wind: Centrifugal instability model. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005ja011191] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Jurac S, Richardson JD. A self-consistent model of plasma and neutrals at Saturn: Neutral cloud morphology. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004ja010635] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S. Jurac
- Center for Space Research; Massachusetts Institute of Technology; Cambridge Massachusetts USA
| | - J. D. Richardson
- Center for Space Research; Massachusetts Institute of Technology; Cambridge Massachusetts USA
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Young DT, Berthelier JJ, Blanc M, Burch JL, Bolton S, Coates AJ, Crary FJ, Goldstein R, Grande M, Hill TW, Johnson RE, Baragiola RA, Kelha V, McComas DJ, Mursula K, Sittler EC, Svenes KR, Szegö K, Tanskanen P, Thomsen MF, Bakshi S, Barraclough BL, Bebesi Z, Delapp D, Dunlop MW, Gosling JT, Furman JD, Gilbert LK, Glenn D, Holmlund C, Illiano JM, Lewis GR, Linder DR, Maurice S, McAndrews HJ, Narheim BT, Pallier E, Reisenfeld D, Rymer AM, Smith HT, Tokar RL, Vilppola J, Zinsmeyer C. Composition and Dynamics of Plasma in Saturn's Magnetosphere. Science 2005; 307:1262-6. [PMID: 15731443 DOI: 10.1126/science.1106151] [Citation(s) in RCA: 257] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
During Cassini's initial orbit, we observed a dynamic magnetosphere composed primarily of a complex mixture of water-derived atomic and molecular ions. We have identified four distinct regions characterized by differences in both bulk plasma properties and ion composition. Protons are the dominant species outside about 9 RS (where RS is the radial distance from the center of Saturn), whereas inside, the plasma consists primarily of a corotating comet-like mix of water-derived ions with approximately 3% N+. Over the A and B rings, we found an ionosphere in which O2+ and O+ are dominant, which suggests the possible existence of a layer of O2 gas similar to the atmospheres of Europa and Ganymede.
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Affiliation(s)
- D T Young
- Southwest Research Institute, San Antonio, TX 78238, USA.
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André N. Low-frequency waves and instabilities in stratified, gyrotropic, multicomponent plasmas: Theory and application to plasma transport in the Io torus. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004ja010599] [Citation(s) in RCA: 15] [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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Sittler EC. Pickup ions at Dione and Enceladus: Cassini Plasma Spectrometer simulations. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2002ja009647] [Citation(s) in RCA: 29] [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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Delitsky ML, Lane AL. Saturn's inner satellites: Ice chemistry and magnetosphere effects. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2002je001855] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Crary FJ, Bagenal F. Ion cyclotron waves, pickup ions, and Io's neutral exosphere. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/2000ja000055] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Richardson JD, Eviatar A, McGrath MA, Vasyliũnas VM. OH in Saturn's magnetosphere: Observations and implications. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98je01127] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Cramm R, Glassmeier KH, Stellmacher M, Othmer C. Evidence for resonant mode coupling in Saturn's magnetosphere. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98ja00629] [Citation(s) in RCA: 16] [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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Maurice S, Sittler EC, Cooper JF, Mauk BH, Blanc M, Selesnick RS. Comprehensive analysis of electron observations at Saturn: Voyager 1 and 2. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96ja00765] [Citation(s) in RCA: 36] [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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Hall DT, Feldman PD, Holberg JB, McGrath MA. Fluorescent hydroxyl emissions from Saturn's ring atmosphere. Science 1996; 272:516-8. [PMID: 8614798 DOI: 10.1126/science.272.5261.516] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Just before earth passed through Saturn's ring plane on 10 August 1995, the Hubble Space Telescope Faint Object Spectrograph detected ultraviolet fluorescent emissions from a tenuous atmosphere of OH molecules enveloping the rings. Brightnesses decrease with increasing distance above the rings, implying a scale height of about 0.45 Saturn radii (Rs). A spatial scan 0.28Rs above the A and B rings indicates OH column densities of about 10(13) cm(-2) and number densities of up to 700 cm(-3). Saturn's rings must produce roughly 10(25) to 10(29) OH molecules per second to maintain the observed OH distribution.
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Affiliation(s)
- D T Hall
- Center for Astrophysical Sciences, Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
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Galopeau PHM, Zarka P, Le Quéau D. Source location of Saturn's kilometric radiation: The Kelvin-Helmholtz instability hypothesis. ACTA ACUST UNITED AC 1995. [DOI: 10.1029/95je02132] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gan-Baruch Z, Eviatar A, Richardson JD, McNutt RL. Plasma observations in the ring plane of Saturn. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/93ja03143] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Barbosa DD, Kurth WS. On the generation of plasma waves in Saturn’s inner magnetosphere. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93ja00477] [Citation(s) in RCA: 42] [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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Barbosa DD. Thermal structure of ions and electrons in Saturn's inner magnetosphere. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93ja00478] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Morfill GE, Havnes O, Goertz CK. Origin and maintenance of the oxygen torus in Saturn's magnetosphere. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93ja00308] [Citation(s) in RCA: 19] [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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Barbosa DD. Theory and observations of electromagnetic ion cyclotron waves in Saturn's inner magnetosphere. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93ja00476] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Huang TS, Birmingham TJ. The polarization electric field and its effects in an anisotropic rotating magnetospheric plasma. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/91ja02611] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Richardson JD, Sittler EC. A plasma density model for Saturn based on Voyager observations. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/ja095ia08p12019] [Citation(s) in RCA: 129] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wilson GR, Waite JH. Kinetic modeling of the Saturn ring-ionosphere plasma environment. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/ja094ia12p17287] [Citation(s) in RCA: 15] [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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Galopeau P, Zarka P, Le Quéau D. Theoretical model of Saturn’s kilometric radiation spectrum. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/ja094ia07p08739] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hood LL. Radial diffusion and losses of energetic protons in the 5 to 12RSregion of Saturn’s magnetosphere. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/ja094ia07p08721] [Citation(s) in RCA: 16] [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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Richardson JD, Eviatar A. Observational and theoretical evidence for anisotropies in Saturn's magnetosphere. ACTA ACUST UNITED AC 1988. [DOI: 10.1029/ja093ia07p07297] [Citation(s) in RCA: 29] [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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Curtis SA, Lepping RP, Sittler EC. The centrifugal flute instability and the generation of Saturnian kilometric radiation. ACTA ACUST UNITED AC 1986. [DOI: 10.1029/ja091ia10p10989] [Citation(s) in RCA: 21] [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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Hood LL. Radial diffusion of low-energy ions in Saturn's radiation belts: A Combined analysis of phase space density and satellite microsignature data. ACTA ACUST UNITED AC 1985. [DOI: 10.1029/ja090ia07p06295] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mauk BH, Krimigis SM, Lepping RP. Particle and field stress balance within a planetary magnetosphere. ACTA ACUST UNITED AC 1985. [DOI: 10.1029/ja090ia09p08253] [Citation(s) in RCA: 33] [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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