Ionospheric electrons in Titan's tail: Plasma structure during the cassini T9 encounter

被引：73

作者：

Coates, A. J.

Crary, F. J.

Young, D. T.

Szego, K.

Arridge, C. S.

Bebesi, Z.

Sittler, E. C., Jr.

Hartle, R. E.

Hill, T. W.

机构：

[1] UCL, Mullard Space Sci Lab, London WC1E 6BT, England

[2] SW Res Inst, Space Sci & Engn, San Antonio, TX 78228 USA

[3] Hungarian Acad Sci, Cent Re Inst Phys, Res Inst Particle & Nucl Phys, Budapest, Hungary

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2007年 / 34卷 / 24期

关键词：

D O I：

10.1029/2007GL030919

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present results from the CAPS electron spectrometer obtained during the downstream flyby of Titan on 26 December 2005, which occurred during a period of enhanced plasma pressure inside the magnetosphere. The electron data show an unusual split signature with two principal intervals of interest outside the nominal corotation wake. Interval 1 shows direct evidence for ionospheric plasma escape at several RT in Titan's tail. Interval 2 shows a complex plasma structure, a mix between plasma of ionospheric and magnetospheric origin. We suggest a mechanism for plasma escape based on ambipolar electric fields set up by suprathermal ionospheric photoelectrons.

引用

页数：6

共 27 条

[1] Titan's magnetic field signature during the first Cassini encounter [J].

Backes, H ;

Neubauer, FM ;

Dougherty, MK ;

Achilleos, N ;

André, N ;

Arridge, CS ;

Bertucci, C ;

Jones, GH ;

Khurana, KK ;

Russell, CT ;

Wennmacher, A .

SCIENCE, 2005, 308 (5724) :992-995

[2] Structure of Titan's mid-range magnetic tail: Cassini magnetometer observations during the T9 flyby [J].

Bertucci, C. ;

Neubauer, F. M. ;

Szego, K. ;

Wahlund, J. -E. ;

Coates, A. J. ;

Dougherty, M. K. ;

Young, D. T. ;

Kurth, W. S. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (24)

[3] Properties of local plasma injections in Saturn's magnetosphere -: art. no. L14S02 [J].

Burch, JL ;

Goldstein, J ;

Hill, TW ;

Young, DT ;

Crary, FJ ;

Coates, AJ ;

André, N ;

Kurth, WS ;

Sittler, EC .

GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (14) :1-4

[4] Cassini observations of planetary-period oscillations of Saturn's magnetopause [J].

Clarke, K. E. ;

Andre, N. ;

Andrews, D. J. ;

Coates, A. J. ;

Cowley, S. W. H. ;

Dougherty, M. K. ;

Lewis, G. R. ;

McAndrews, H. J. ;

Nichols, J. D. ;

Robinson, T. R. ;

Wright, D. M. .

GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (23)

[5]

COATES AJ, 2007, IN PRESS PLANET SPAC

[6] Titan's ionosphere:: Model comparisons with Cassini Ta Data -: art. no. L12108 [J].

Cravens, TE ;

Robertson, IP ;

Clark, J ;

Wahlund, JE ;

Waite, JH ;

Ledvina, SA ;

Niemann, HB ;

Yelle, RV ;

Kasprzak, WT ;

Luhmann, JG ;

McNutt, RL ;

Ip, WH ;

De La Haye, V ;

Müller-Wodarg, I ;

Young, DT ;

Coates, AJ .

GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (12) :1-5

[7] Locations of atmospheric photoelectron energy peaks within the mars environment [J].

Frahm, R. A. ;

Sharber, J. R. ;

Winningham, J. D. ;

Wurz, P. ;

Liemohn, M. W. ;

Kallio, E. ;

Yamauchi, M. ;

Lundin, R. ;

Barabash, S. ;

Coates, A. J. ;

Linder, D. R. ;

Kozyra, J. U. ;

Holmstrom, M. ;

Jeffers, S. J. ;

Andersson, H. ;

Mckenna-Lawler, S. .

SPACE SCIENCE REVIEWS, 2006, 126 (1-4) :389-402

[8] Carbon dioxide photoelectron energy peaks at Mars [J].

Frahm, R. A. ;

Winningham, J. D. ;

Sharber, J. R. ;

Scherrer, J. R. ;

Jeffers, S. J. ;

Coates, A. J. ;

Linder, D. R. ;

Kataria, D. O. ;

Lundin, R. ;

Barabash, S. ;

Holmstrom, M. ;

Andersson, H. ;

Yamauchi, M. ;

Grigoriev, A. ;

Kallio, E. ;

Sales, T. ;

Riihela, P. ;

Schmidt, W. ;

Koskinen, H. ;

Kozyra, J. U. ;

Luhmann, J. G. ;

Roelof, E. C. ;

Williams, D. J. ;

Livi, S. ;

Curtis, C. C. ;

Hsieh, K. C. ;

Sandel, B. R. ;

Grande, M. ;

Carter, M. ;

Sauvaud, J. -A. ;

Fedorov, A. ;

Thocaven, J. -J. ;

McKenna-Lawler, S. ;

Orsini, S. ;

Cerulli-Irelli, R. ;

Maggi, M. ;

Wurz, P. ;

Bochsler, P. ;

Krupp, N. ;

Woch, J. ;

Franz, M. ;

Asamura, K. ;

Dierker, C. .

ICARUS, 2006, 182 (02) :371-382

[9] Electron temperature of Titan's sunlit ionosphere [J].

Galand, M. ;

Yelle, R. V. ;

Coates, A. J. ;

Backes, H. ;

Wahlund, J. -E. .

GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (21)

[10]

GAN L, 1993, COSPAR COLL, V4, P171

← 1 2 3 →