Corotating Magnetic Reconnection Site in Saturn's Magnetosphere

被引：29

作者：

Yao, Z. H. ^{[1
,2
]}

Coates, A. J. ^{[1
,3
]}

Ray, L. C. ^{[1
,4
]}

Rae, I. J. ^{[1
]}

Grodent, D. ^{[2
]}

Jones, G. H. ^{[1
,3
]}

Dougherty, M. K. ^{[5
]}

Owen, C. J. ^{[1
]}

Guo, R. L. ^{[6
]}

Dunn, W. R. ^{[1
,3
]}

Radioti, A. ^{[2
]}

Pu, Z. Y. ^{[7
]}

Lewis, G. R. ^{[1
]}

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

Gerard, J. -C. ^{[2
]}

机构：

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

[2] Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, B-4000 Liege, Belgium

[3] UCL Birkbeck, Ctr Planetary Sci, Gower St, London WC1E 6BT, England

[4] Univ Lancaster, Dept Phys, Lancaster, England

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

[6] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China

[7] Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China

[8] Southwest Res Inst, San Antonio, TX USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2017年 / 846卷 / 02期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

acceleration of particles; magnetic fields; magnetic reconnection; plasmas; FIELD; MAGNETOTAIL; PLASMOIDS;

D O I：

10.3847/2041-8213/aa88af

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using measurements from the Cassini spacecraft in Saturn's magnetosphere, we propose a 3D physical picture of a corotating reconnection site, which can only be driven by an internally generated source. Our results demonstrate that the corotating magnetic reconnection can drive an expansion of the current sheet in Saturn's magnetosphere and, consequently, can produce Fermi acceleration of electrons. This reconnection site lasted for longer than one of Saturn's rotation period. The long-lasting and corotating natures of the magnetic reconnection site at Saturn suggest fundamentally different roles of magnetic reconnection in driving magnetospheric dynamics (e.g., the auroral precipitation) from the Earth. Our corotating reconnection picture could also potentially shed light on the fast rotating magnetized plasma environments in the solar system and beyond.

引用

页数：7

共 50 条

[31] Evidence for reconnection at Saturn's magnetopause
McAndrews, H. J.
Owen, C. J.
Thomsen, M. F.
Lavraud, B.
Coates, A. J.
Dougherty, M. K.
Young, D. T.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2008, 113 (A4)
[32] Open flux in Saturn's magnetosphere
Badman, Sarah V.
Jackman, Caitriona M.
Nichols, Jonathan D.
Clarke, John T.
Gerard, Jean-Claude
ICARUS, 2014, 231 : 137 - 145
[33] Electron sources in Saturn's magnetosphere
Rymer, A. M.
Mauk, B. H.
Hill, T. W.
Paranicas, C.
Andre, N.
Sittler, E. C., Jr.
Mitchell, D. G.
Smith, H. T.
Johnson, R. E.
Coates, A. J.
Young, D. T.
Bolton, S. J.
Thomsen, M. F.
Dougherty, M. K.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2007, 112 (A2)
[34] Freak waves in Saturn’s magnetosphere
R. Sabry
Astrophysics and Space Science, 2015, 355 : 33 - 41
[35] Freak waves in Saturn's magnetosphere
Sabry, R.
ASTROPHYSICS AND SPACE SCIENCE, 2015, 355 (01) : 33 - 41
[36] The electron density of Saturn's magnetosphere
Morooka, M. W.
Modolo, R.
Wahlund, J. -E.
Andre, M.
Eriksson, A. I.
Persoon, A. M.
Gurnett, D. A.
Kurth, W. S.
Coates, A. J.
Lewis, G. R.
Khurana, K. K.
Dougherty, M.
ANNALES GEOPHYSICAE, 2009, 27 (07) : 2971 - 2991
[37] Plasma heating in the Saturn's magnetosphere
Martinez-Gomez, E.
Durand-Manterola, H.
Perez de Tejada, H.
PLASMA AND FUSION SCIENCE, 2006, 875 : 308 - +
[38] Viewpoint - Saturn's variabie magnetosphere
Gombosi, TI
Hansen, KC
SCIENCE, 2005, 307 (5713) : 1224 - 1226
[39] Electron circulation in Saturn's magnetosphere
Rymer, A. M.
Mauk, B. H.
Hill, T. W.
Paranicas, C.
Mitchell, D. G.
Coates, A. J.
Young, D. T.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2008, 113 (A1)
[40] Special issue: Titan, Saturn, and Saturn's Magnetosphere Preface
Barnes, Jason W.
Simon-Miller, Amy A.
Turtle, Elizabeth P.
Dougherty, Michele K.
Brown, Robert H.
PLANETARY AND SPACE SCIENCE, 2009, 57 (14-15) : 1649 - 1649

← 1 2 3 4 5 →