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; V. 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; C. 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, 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, V. 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, C. 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 O ₂⁺ 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 (US)
Pages (from-to)	1262-1266
Number of pages	5
Journal	Science
Volume	307
Issue number	5713
DOIs	https://doi.org/10.1126/science.1106151
State	Published - Feb 25 2005
Externally published	Yes

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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{2f69da90d50447efb164c9b85818ea82,

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 O 2+ and O+ are dominant, which suggests the possible existence of a layer of O2 gas similar to the atmospheres of Europa and Ganymede.",

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

year = "2005",

month = feb,

day = "25",

doi = "10.1126/science.1106151",

language = "English (US)",

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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 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, V.

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, C.

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 - 2005/2/25

Y1 - 2005/2/25

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 O 2+ 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 O 2+ 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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U2 - 10.1126/science.1106151

DO - 10.1126/science.1106151

M3 - Article

C2 - 15731443

AN - SCOPUS:20044376077

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

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