On magnetospheric electron impact ionisation and dynamics in Titan's ram-side and polar ionosphere - a Cassini case study

被引：68

作者：

Agren, K. ^{[1
]}

Wahlund, J. -E. ^{[1
]}

Modolo, R. ^{[1
]}

Lummerzheim, D. ^{[2
]}

Galand, M. ^{[3
]}

Mueller-Wodarg, I. ^{[3
]}

Canu, P. ^{[4
]}

Kurth, W. S. ^{[5
]}

Cravens, T. E. ^{[6
]}

Yelle, R. V. ^{[7
]}

Waite, J. H., Jr. ^{[8
]}

Coates, A. J. ^{[9
]}

Lewis, G. R.

Young, D. T. ^{[10
]}

Bertucci, C. ^{[3
]}

Dougherty, M. K. ^{[3
]}

机构：

[1] Swedish Inst Space Phys, S-75121 Uppsala, Sweden

[2] Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA

[3] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Space & Atmospher Phys Grp, London SW7 2BW, England

[4] Inst Pierre Simon Laplace, CNRS, Ctr Etude Environm Terrestre & Planetaires, F-78140 Velizy Villacoublay, France

[5] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[6] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[7] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[8] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA

[9] UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[10] SW Res Inst, San Antonio, TX 78238 USA

来源：

ANNALES GEOPHYSICAE | 2007年 / 25卷 / 11期

基金：

英国科学技术设施理事会;

关键词：

ionosphere (Planetary ionospheres; Plasma; temperature and density); Magnetospheric physics Magnetosphere-ionosphere interactions);

D O I：

10.5194/angeo-25-2359-2007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present data from the sixth Cassini flyby of Titan (T5), showing that the magnetosphere of Saturn strongly interacts with the moon's ionosphere and exo-ionosphere. A simple electron ionisation model provides a reasonable agreement with the altitude structure of the ionosphere. Furthermore, we suggest that the dense and cold exo-ionosphere (from the exobase at 1430 km and outward to several Titan radii from the surface) can be explained by magnetospheric forcing and other transport processes whereas exospheric ionisation by impacting low energy electrons seems to play a minor role.

引用

页码：2359 / 2369

页数：11

共 30 条

[21] Titan's near magnetotail from magnetic field and electron plasma observations and modeling: Cassini flybys TA, TB, and T3 [J].

Neubauer, F. M. ;

Backes, H. ;

Dougherty, M. K. ;

Wennmacher, A. ;

Russell, C. T. ;

Coates, A. ;

Young, D. ;

Achilleos, N. ;

Andre, N. ;

Arridge, C. S. ;

Bertucci, C. ;

Jones, G. H. ;

Khurana, K. K. ;

Knetter, T. ;

Law, A. ;

Lewis, G. R. ;

Saur, J. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2006, 111 (A10)

[22] The abundances of constituents of Titan's atmosphere from the GCMS instrument on the Huygens probe [J].

Niemann, HB ;

Atreya, SK ;

Bauer, SJ ;

Carignan, GR ;

Demick, JE ;

Frost, RL ;

Gautier, D ;

Haberman, JA ;

Harpold, DN ;

Hunten, DM ;

Israel, G ;

Lunine, JI ;

Kasprzak, WT ;

Owen, TC ;

Paulkovich, M ;

Raulin, F ;

Raaen, E ;

Way, SH .

NATURE, 2005, 438 (7069) :779-784

[23]

REES MH, 1963, PHYS CHEM UPPER ATMO

[24] PHOTOCHEMICAL MODELING OF TITANS ATMOSPHERE [J].

TOUBLANC, D ;

PARISOT, JP ;

BRILLET, J ;

GAUTIER, D ;

RAULIN, F ;

MCKAY, CP .

ICARUS, 1995, 113 (01) :2-26

[25] The Solar Wind interaction with Mars:: locations and shapes of the Bow Shock and the Magnetic Pile-up Boundary from the observations of the MAG/ER experiment onboard Mars Global Surveyor [J].

Vignes, D ;

Mazelle, C ;

Rme, H ;

Acuña, MH ;

Connerney, JEP ;

Lin, RP ;

Mitchell, DL ;

Cloutier, P ;

Crider, DH ;

Ness, NF .

GEOPHYSICAL RESEARCH LETTERS, 2000, 27 (01) :49-52

[26] The nitrogen chemistry of Titan's upper atmosphere revealed [J].

Vuitton, V. ;

Yelle, R. V. ;

Anicich, V. G. .

ASTROPHYSICAL JOURNAL, 2006, 647 (02) :L175-L178

[27] Cassini measurements of cold plasma in the ionosphere of Titan [J].

Wahlund, JE ;

Boström, R ;

Gustafsson, G ;

Gurnett, DA ;

Kurth, WS ;

Pedersen, A ;

Averkamp, TF ;

Hospodarsky, GB ;

Persoon, AM ;

Canu, P ;

Neubauer, FM ;

Dougherty, MK ;

Eriksson, AI ;

Morooka, MW ;

Gill, R ;

André, M ;

Eliasson, L ;

Müller-Wodarg, I .

SCIENCE, 2005, 308 (5724) :986-989

[28] Ion Neutral Mass Spectrometer results from the first flyby of Titan [J].

Waite, JH ;

Niemann, H ;

Yelle, RV ;

Kasprzak, WT ;

Cravens, TE ;

Luhmann, JG ;

McNutt, RL ;

Ip, WH ;

Gell, D ;

De La Haye, V ;

Müller-Wordag, I ;

Magee, B ;

Borggren, N ;

Ledvina, S ;

Fletcher, G ;

Walter, E ;

Miller, R ;

Scherer, S ;

Thorpe, R ;

Xu, J ;

Block, B ;

Arnett, K .

SCIENCE, 2005, 308 (5724) :982-986

[29] The vertical structure of Titan's upper atmosphere from Cassini Ion Neutral Mass Spectrometer measurements [J].

Yelle, Roger V. ;

Borggren, N. ;

de la Haye, V. ;

Kasprzak, W. T. ;

Niemann, H. B. ;

Muller-Wodarg, I. ;

Waite, J. H., Jr. .

ICARUS, 2006, 182 (02) :567-576

[30] NON-LTE MODELS OF TITANS UPPER-ATMOSPHERE [J].

YELLE, RV .

ASTROPHYSICAL JOURNAL, 1991, 383 (01) :380-400

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