Heavy ions, temperatures and winds in Titan's ionosphere: Combined Cassini CAPS and INMS observations

被引：95

作者：

Crary, F. J. ^{[1
]}

Magee, B. A. ^{[1
]}

Mandt, K. ^{[1
]}

Waite, J. H., Jr. ^{[1
]}

Westlake, J. ^{[1
]}

Young, D. T. ^{[1
]}

机构：

[1] SW Res Inst, San Antonio, TX 78229 USA

来源：

PLANETARY AND SPACE SCIENCE | 2009年 / 57卷 / 14-15期

关键词：

Titan; Ionosphere; Heavy ions; Ionospheric winds; Ion temperature; UPPER-ATMOSPHERE; PLASMA; MECHANISMS; CHEMISTRY; CATIONS; RADIO; MODEL;

D O I：

10.1016/j.pss.2009.09.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Multiple Titan encounters by the Cassini spacecraft have shown that ion chemistry in Titan's upper atmosphere is much more complex than previously thought. As well as showing a great variety of species present below 100 amu, they also include the detection of negative ions and of large abundances of ions above 100 amu. Here, we use data from two Cassini instruments, the Cassini plasma spectrometer's ion beam sensor (CAPS/IBS) and the ion and neutral mass spectrometer (INMS) during fourteen Cassini encounters with Titan's upper atmosphere. By simultaneous analysis of the combined data, we are able to determine the ion temperature, one component of the wind speed and spacecraft potential. Using these derived quantities, we are also able to extend the analysis of CAPS/IBS data to quantify the abundance of ions above 100 amu and to statistically estimate their composition. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1847 / 1856

页数：10

共 26 条

[1] ISEE-1 AND ISEE-2 FAST PLASMA EXPERIMENT AND ISEE-1 SOLAR-WIND EXPERIMENT [J].

BAME, SJ ;

ASBRIDGE, JR ;

FELTHAUSER, HE ;

GLORE, JP ;

PASCHMANN, G ;

HEMMERICH, P ;

LEHMANN, K ;

ROSENBAUER, H .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1978, 16 (03) :216-220

[2] Mechanisms for the growth of polycyclic aromatic hydrocarbon (PAH) cations [J].

Bauschlicher, CW ;

Ricca, A ;

Rosi, M .

CHEMICAL PHYSICS LETTERS, 2002, 355 (1-2) :159-163

[3] Detection of Titan's ionosphere from Voyager 1 radio occultation observations [J].

Bird, MK ;

Dutta-Roy, R ;

Asmar, SW ;

Rebold, TA .

ICARUS, 1997, 130 (02) :426-436

[4] Discovery of heavy negative ions in Titan's ionosphere [J].

Coates, A. J. ;

Crary, F. J. ;

Lewis, G. R. ;

Young, D. T. ;

Waite, J. H., Jr. ;

Sittler, E. C., Jr. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (22)

[5] Composition of titan's ionosphere [J].

Cravens, TE ;

Robertson, IP ;

Waite, JH ;

Yelle, RV ;

Kasprzak, WT ;

Keller, CN ;

Ledvina, SA ;

Niemann, HB ;

Luhmann, JG ;

McNutt, RL ;

Ip, WH ;

De La Haye, V ;

Mueller-Wodarg, I ;

Wahlund, JE ;

Anicich, VG ;

Vuitton, V .

GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (07)

[6] The ionosphere of Titan: an updated theoretical model [J].

Cravens, TE ;

Vann, J ;

Clark, J ;

Yu, J ;

Keller, CN ;

Brull, C .

PLANETARY ATMOSPHERES, IONOSPHERES AND PLASMA INTERACTIONS, 2004, 33 (02) :212-215

[7] Cassini Ion and Neutral Mass Spectrometer data in Titan's upper atmosphere and exosphere: Observation of a suprathermal corona [J].

De la Haye, V. ;

Waite, J. H., Jr. ;

Johnson, R. E. ;

Yelle, R. V. ;

Cravens, T. E. ;

Luhmann, J. G. ;

Kasprzak, W. T. ;

Gell, D. A. ;

Magee, B. ;

Leblanc, F. ;

Michael, M. ;

Jurac, S. ;

Robertson, I. P. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2007, 112 (A7)

[8] Titan's atmospheric temperatures, winds, and composition [J].

Flasar, FM ;

Achterberg, RK ;

Conrath, BJ ;

Gierasch, PJ ;

Kunde, VG ;

Nixon, CA ;

Bjoraker, GL ;

Jennings, DE ;

Romani, PN ;

Simon-Miller, AA ;

Bézard, B ;

Coustenis, A ;

Irwin, PGJ ;

Teanby, NA ;

Brasunas, J ;

Pearl, JC ;

Segura, ME ;

Carlson, RC ;

Mamoutkine, A ;

Schinder, PJ ;

Barucci, A ;

Courtin, R ;

Fouchet, T ;

Gautier, D ;

Lellouch, E ;

Marten, A ;

Prangé, R ;

Vinatier, S ;

Strobel, DF ;

Calcutt, SB ;

Read, PL ;

Taylor, FW ;

Bowles, N ;

Samuelson, RE ;

Orton, GS ;

Spilker, LJ ;

Owen, TC ;

Spencer, JR ;

Showalter, MR ;

Ferrari, C ;

Abbas, MM ;

Raulin, F ;

Edgington, S ;

Ade, P ;

Wishnow, EH .

SCIENCE, 2005, 308 (5724) :975-978

[9] Hydrocarbon ions in the ionosphere of Titan [J].

Fox, JL ;

Yelle, RV .

GEOPHYSICAL RESEARCH LETTERS, 1997, 24 (17) :2179-2182

[10] The Cassini radio and plasma wave investigation [J].

Gurnett, DA ;

Kurth, WS ;

Kirchner, DL ;

Hospodarsky, GB ;

Averkamp, TF ;

Zarka, P ;

Lecacheux, A ;

Manning, R ;

Roux, A ;

Canu, P ;

Cornilleau-Wehrlin, N ;

Galopeau, P ;

Meyer, A ;

Boström, R ;

Gustafsson, G ;

Wahlund, JE ;

Åhlen, L ;

Rucker, HO ;

Ladreiter, HP ;

Macher, W ;

Woolliscroft, LJC ;

Alleyne, H ;

Kaiser, ML ;

Desch, MD ;

Farrell, WM ;

Harvey, CC ;

Louarn, P ;

Kellogg, PJ ;

Goetz, K ;

Pedersen, A .

SPACE SCIENCE REVIEWS, 2004, 114 (1-4) :395-463

← 1 2 3 →