PMO OpenIR  > 太阳和太阳系等离子体研究团组
Comparative study of bow shock models using Wind and Geotail observations
Dmitriev, AV; Chao, JK; Wu, DJ
2003-12-31
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN0148-0227
Volume108Issue:A12Pages:A12
AbstractWind and Geotail observed bow shock (BS) crossings were selected from the 1998 to 2001 ISTP database. We analyzed 625 case events containing 4381 Geotail BS crossings and 130 case events containing 917 Wind BS crossings. The location of the BS crossings, in the aberrated GSE coordinate system, varied over a wide range from -85 Re to 45 Re along the X-GSE axis, up to 90 Re in the perpendicular direction. ACE, Wind, and Geotail measurements were used to determine the upstream solar wind conditions in the interplanetary medium. These conditions were determined for the BS crossings in each case event by using the delay time of direct solar wind propagation from an upstream monitor to the probe satellite (Wind or Geotail). The solar wind conditions for the BS crossings varied over a wide range of dynamic pressures Pd (from 0.02 nPa to 49 nPa), IMF Bzs (from -26 nT to 23 nT), thermal/magnetic pressure ratios beta (from 0.002 to 50), and magnetosonic Mach numbers M(ms) (from 1.02 to 29). Such a wide spatial and dynamic range of BS crossings permits us to consider the different parameters that control the BS size and shape, such as the radius of curvature of the magnetopause which depends on Pd and Bz, the Alfven, sonic, and magnetosonic Mach numbers, and the IMF orientation. To study the dependence on these parameters, we compared the accuracy of the BS models formulated by Peredo et al. [1995], Russell and Petrinec [1996], Verigin et al. [2001b], and Chao et al. [2002] for the prediction of selected BS crossings observed in different bow shock regions and with various upstream solar wind conditions. It was found that the Chao et al. [2002] model had the best capability for predicting the BS crossings. The solar wind dynamic pressure and magnetosonic Mach number were determined to be the most important parameters controlling the BS size and shape. The important role of the dawn-dusk asymmetry of the bow shock tail region is emphasized. The effect of the southward IMF influence on the dayside magnetosheath thickness is revealed and discussed.
KeywordBow Shock Magnetosheath Magnetopause
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1029/2003JA010027
WOS KeywordINTERPLANETARY MAGNETIC-FIELD ; SOLAR-WIND ; MAGNETOPAUSE SHAPE ; MACH NUMBER ; DAYSIDE MAGNETOPAUSE ; STANDOFF DISTANCE ; FLARING ANGLE ; 3-D SHAPE ; POSITION ; LOCATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000187898400006
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4599
Collection太阳和太阳系等离子体研究团组
Affiliation1.Natl Cent Univ, Inst Space Sci, Chungli 32001, Taiwan
2.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia
Recommended Citation
GB/T 7714
Dmitriev, AV,Chao, JK,Wu, DJ. Comparative study of bow shock models using Wind and Geotail observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2003,108(A12):A12.
APA Dmitriev, AV,Chao, JK,&Wu, DJ.(2003).Comparative study of bow shock models using Wind and Geotail observations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,108(A12),A12.
MLA Dmitriev, AV,et al."Comparative study of bow shock models using Wind and Geotail observations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 108.A12(2003):A12.
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