Composition and dynamics of plasma in Saturn's magnetosphere

D.T. Young; J.-J. Berthelier; M. Blanc; J.L. Burch; S. Bolton; A.J. Coates; F.J. Crary; R. Goldstein; M. Grande; T.W. Hill; R.E. Johnson; R.A. Baragiola; Väinö Kelha; D.J. McComas; K. Mursula; E.C. Sittler; K.R. Svenes; K. Szegö; P. Tanskanen; M.F. Thomsen; S. Bakshi; B.L. Barraclough; Z. Bebesi; D. Delapp; M.W. Dunlop; J.T. Gosling; J.D. Furman; L.K. Gilbert; D. Glenn; Christer Holmlund; J.-M.. Illiano; G.R. Lewis; D.R. Linder; S. Maurice; H.J. McAndrews; B.T. Narheim; E. Pallier; D. Reisenfeld; A.M. Rymer; H.T. Smith; R.L. Tokar; J. Vilppola; C. Zinsmeyer

doi:10.1126/science.1106151

Composition and dynamics of plasma in Saturn's magnetosphere

D.T. Young (Corresponding Author), J.-J. Berthelier, M. Blanc, J.L. Burch, S. Bolton, A.J. Coates, F.J. Crary, R. Goldstein, M. Grande, T.W. Hill, R.E. Johnson, R.A. Baragiola, Väinö Kelha, D.J. McComas, K. Mursula, E.C. Sittler, K.R. Svenes, K. Szegö, P. Tanskanen, M.F. ThomsenS. Bakshi, B.L. Barraclough, Z. Bebesi, D. Delapp, M.W. Dunlop, J.T. Gosling, J.D. Furman, L.K. Gilbert, D. Glenn, Christer Holmlund, J.-M.. Illiano, G.R. Lewis, D.R. Linder, S. Maurice, H.J. McAndrews, B.T. Narheim, E. Pallier, D. Reisenfeld, A.M. Rymer, H.T. Smith, R.L. Tokar, J. Vilppola, C. Zinsmeyer

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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 R_S (where R_S 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 ∼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.

Original language	English
Pages (from-to)	1262 - 1266
Number of pages	5
Journal	Science
Volume	307
Issue number	5713
DOIs	https://doi.org/10.1126/science.1106151
Publication status	Published - 2005
MoE publication type	A1 Journal article-refereed

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Young, D. T., Berthelier, J-J., Blanc, M., Burch, J. L., Bolton, S., Coates, A. J., Crary, F. J., Goldstein, R., Grande, M., Hill, T. W., Johnson, R. E., Baragiola, R. A., Kelha, V., McComas, D. J., Mursula, K., Sittler, E. C., Svenes, K. R., Szegö, K., Tanskanen, P., ... Zinsmeyer, C. (2005). Composition and dynamics of plasma in Saturn's magnetosphere. Science, 307(5713), 1262 - 1266. https://doi.org/10.1126/science.1106151

@article{9ea59c8d37ba4b85ace71afc5b65e05d,

title = "Composition and dynamics of plasma in Saturn's magnetosphere",

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 ∼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.",

author = "D.T. Young and J.-J. Berthelier and M. Blanc and J.L. Burch and S. Bolton and A.J. Coates and F.J. Crary and R. Goldstein and M. Grande and T.W. Hill and R.E. Johnson and R.A. Baragiola and V{\"a}in{\"o} Kelha and D.J. McComas and K. Mursula and E.C. Sittler and K.R. Svenes and K. Szeg{\"o} and P. Tanskanen and M.F. Thomsen and S. Bakshi and B.L. Barraclough and Z. Bebesi and D. Delapp and M.W. Dunlop and J.T. Gosling and J.D. Furman and L.K. Gilbert and D. Glenn and Christer Holmlund and J.-M.. Illiano and G.R. Lewis and D.R. Linder and S. Maurice and H.J. McAndrews and B.T. Narheim and E. Pallier and D. Reisenfeld and A.M. Rymer and H.T. Smith and R.L. Tokar and J. Vilppola and C. Zinsmeyer",

year = "2005",

doi = "10.1126/science.1106151",

language = "English",

volume = "307",

pages = "1262 -- 1266",

journal = "Science",

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Young, DT, Berthelier, J-J, 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, J-M, Lewis, GR, Linder, DR, Maurice, S, McAndrews, HJ, Narheim, BT, Pallier, E, Reisenfeld, D, Rymer, AM, Smith, HT, Tokar, RL, Vilppola, J & Zinsmeyer, C 2005, 'Composition and dynamics of plasma in Saturn's magnetosphere', Science, vol. 307, no. 5713, pp. 1262 - 1266. https://doi.org/10.1126/science.1106151

TY - JOUR

T1 - Composition and dynamics of plasma in Saturn's magnetosphere

AU - Young, D.T.

AU - Berthelier, J.-J.

AU - Blanc, M.

AU - Burch, J.L.

AU - Bolton, S.

AU - Coates, A.J.

AU - Crary, F.J.

AU - Goldstein, R.

AU - Grande, M.

AU - Hill, T.W.

AU - Johnson, R.E.

AU - Baragiola, R.A.

AU - Kelha, Väinö

AU - McComas, D.J.

AU - Mursula, K.

AU - Sittler, E.C.

AU - Svenes, K.R.

AU - Szegö, K.

AU - Tanskanen, P.

AU - Thomsen, M.F.

AU - Bakshi, S.

AU - Barraclough, B.L.

AU - Bebesi, Z.

AU - Delapp, D.

AU - Dunlop, M.W.

AU - Gosling, J.T.

AU - Furman, J.D.

AU - Gilbert, L.K.

AU - Glenn, D.

AU - Holmlund, Christer

AU - Illiano, J.-M..

AU - Lewis, G.R.

AU - Linder, D.R.

AU - Maurice, S.

AU - McAndrews, H.J.

AU - Narheim, B.T.

AU - Pallier, E.

AU - Reisenfeld, D.

AU - Rymer, A.M.

AU - Smith, H.T.

AU - Tokar, R.L.

AU - Vilppola, J.

AU - Zinsmeyer, C.

PY - 2005

Y1 - 2005

N2 - 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 ∼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.

AB - 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 ∼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.

U2 - 10.1126/science.1106151

DO - 10.1126/science.1106151

M3 - Article

SN - 0036-8075

VL - 307

SP - 1262

EP - 1266

JO - Science

JF - Science

IS - 5713

ER -

Composition and dynamics of plasma in Saturn's magnetosphere

Abstract

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