Density holes in the upstream solar wind

G. K. Parks; E. Lee; N. Lin; F. Mozer; M. Wilber; E. Lucek; I. Dandouras; H. Rème; J. B. Cao; P. Canu; N. Cornilleau-Wehrlin; P. Décréau; M. L. Goldstein; Philippe Escoubet

doi:10.1063/1.2778939

Density holes in the upstream solar wind

G. K. Parks^*
, E. Lee
, N. Lin
, F. Mozer
, M. Wilber
, E. Lucek
, I. Dandouras
, H. Rème
, J. B. Cao
, P. Canu
, N. Cornilleau-Wehrlin
, P. Décréau
, M. L. Goldstein
, Philippe Escoubet

^*此作品的通讯作者

University of California at Berkeley
Imperial College London
Institute de Recherche en Astrophysique et Planétologie
CAS - National Space Science Center
IPSL
Université d'Orléans
NASA Goddard Space Flight Center
ESA/ESTEC

科研成果: 书/报告/会议事项章节 › 会议稿件 › 同行评审

12 引用（Scopus）

摘要

Larmor size transient structures with depletions as large as 99% of ambient solar wind density levels occur commonly upstream of Earth's collisionless bow shock. These "density holes" have a mean duration of ∼17.9 ± 10.4s but holes as short as 4s have been observed. The average fractional density depletion (δn/n) inside the holes is ∼0.68 ± 0.14. The density of the upstream edge moving in the sunward direction can be enhanced by five or more times the solar wind density. Particle distributions show the steepened edge can behave like a shock, and measured local field geometries and Mach number support this view. Similarly shaped magnetic holes accompany the density holes indicating strong coupling between fields and particles. The density holes are only observed with upstream particles, suggesting that back-streaming particles interacting with the solar wind are important.

源语言	英语
主期刊名	TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS
主期刊副标题	6th Annual International Astrophysics Conference
页	9-15
页数	7
DOI	https://doi.org/10.1063/1.2778939
出版状态	已出版 - 2007
已对外发布	是
活动	TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference - Oahu, HI, 美国期限: 16 3月 2007 → 22 3月 2007

出版系列

姓名	AIP Conference Proceedings
卷	932
ISSN（印刷版）	0094-243X
ISSN（电子版）	1551-7616

会议

会议	TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference
国家/地区	美国
市	Oahu, HI
时期	16/03/07 → 22/03/07

访问文件

10.1063/1.2778939

其它文件与链接

链接到 Scopus 的出版物

引用此

Parks, G. K., Lee, E., Lin, N., Mozer, F., Wilber, M., Lucek, E., Dandouras, I., Rème, H., Cao, J. B., Canu, P., Cornilleau-Wehrlin, N., Décréau, P., Goldstein, M. L., & Escoubet, P. (2007). Density holes in the upstream solar wind. 在 TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference (页码 9-15). (AIP Conference Proceedings; 卷 932). https://doi.org/10.1063/1.2778939

@inproceedings{20e2572f97254f3a817a43c54f414d05,

title = "Density holes in the upstream solar wind",

abstract = "Larmor size transient structures with depletions as large as 99\% of ambient solar wind density levels occur commonly upstream of Earth's collisionless bow shock. These {"}density holes{"} have a mean duration of ∼17.9 ± 10.4s but holes as short as 4s have been observed. The average fractional density depletion (δn/n) inside the holes is ∼0.68 ± 0.14. The density of the upstream edge moving in the sunward direction can be enhanced by five or more times the solar wind density. Particle distributions show the steepened edge can behave like a shock, and measured local field geometries and Mach number support this view. Similarly shaped magnetic holes accompany the density holes indicating strong coupling between fields and particles. The density holes are only observed with upstream particles, suggesting that back-streaming particles interacting with the solar wind are important.",

keywords = "Density hole",

author = "Parks, \{G. K.\} and E. Lee and N. Lin and F. Mozer and M. Wilber and E. Lucek and I. Dandouras and H. R{\`e}me and Cao, \{J. B.\} and P. Canu and N. Cornilleau-Wehrlin and P. D{\'e}cr{\'e}au and Goldstein, \{M. L.\} and Philippe Escoubet",

year = "2007",

doi = "10.1063/1.2778939",

language = "英语",

isbn = "0735404437",

series = "AIP Conference Proceedings",

pages = "9--15",

booktitle = "TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS",

note = "TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference ; Conference date: 16-03-2007 Through 22-03-2007",

}

Parks, GK, Lee, E, Lin, N, Mozer, F, Wilber, M, Lucek, E, Dandouras, I, Rème, H, Cao, JB, Canu, P, Cornilleau-Wehrlin, N, Décréau, P, Goldstein, ML & Escoubet, P 2007, Density holes in the upstream solar wind. 在 TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference. AIP Conference Proceedings, 卷 932, 页码 9-15, TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference, Oahu, HI, 美国, 16/03/07. https://doi.org/10.1063/1.2778939

TY - GEN

T1 - Density holes in the upstream solar wind

AU - Parks, G. K.

AU - Lee, E.

AU - Lin, N.

AU - Mozer, F.

AU - Wilber, M.

AU - Lucek, E.

AU - Dandouras, I.

AU - Rème, H.

AU - Cao, J. B.

AU - Canu, P.

AU - Cornilleau-Wehrlin, N.

AU - Décréau, P.

AU - Goldstein, M. L.

AU - Escoubet, Philippe

PY - 2007

Y1 - 2007

N2 - Larmor size transient structures with depletions as large as 99% of ambient solar wind density levels occur commonly upstream of Earth's collisionless bow shock. These "density holes" have a mean duration of ∼17.9 ± 10.4s but holes as short as 4s have been observed. The average fractional density depletion (δn/n) inside the holes is ∼0.68 ± 0.14. The density of the upstream edge moving in the sunward direction can be enhanced by five or more times the solar wind density. Particle distributions show the steepened edge can behave like a shock, and measured local field geometries and Mach number support this view. Similarly shaped magnetic holes accompany the density holes indicating strong coupling between fields and particles. The density holes are only observed with upstream particles, suggesting that back-streaming particles interacting with the solar wind are important.

AB - Larmor size transient structures with depletions as large as 99% of ambient solar wind density levels occur commonly upstream of Earth's collisionless bow shock. These "density holes" have a mean duration of ∼17.9 ± 10.4s but holes as short as 4s have been observed. The average fractional density depletion (δn/n) inside the holes is ∼0.68 ± 0.14. The density of the upstream edge moving in the sunward direction can be enhanced by five or more times the solar wind density. Particle distributions show the steepened edge can behave like a shock, and measured local field geometries and Mach number support this view. Similarly shaped magnetic holes accompany the density holes indicating strong coupling between fields and particles. The density holes are only observed with upstream particles, suggesting that back-streaming particles interacting with the solar wind are important.

KW - Density hole

UR - https://www.scopus.com/pages/publications/36348985153

U2 - 10.1063/1.2778939

DO - 10.1063/1.2778939

M3 - 会议稿件

AN - SCOPUS:36348985153

SN - 0735404437

SN - 9780735404434

T3 - AIP Conference Proceedings

SP - 9

EP - 15

BT - TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS

T2 - TURBULENCE AND NONLINEAR PROCESSES IN ASTROPHYSICAL PLASMAS: 6th Annual International Astrophysics Conference

Y2 - 16 March 2007 through 22 March 2007

ER -

Density holes in the upstream solar wind

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