Comparative study of bow shock models using Wind and Geotail observations

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 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
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2003-12-31
卷号	108 期号:A12 页码:A12
关键词	bow shock magnetosheath magnetopause
ISSN号	0148-0227
英文摘要	Wind 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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	INTERPLANETARY MAGNETIC-FIELD ; SOLAR-WIND ; MAGNETOPAUSE SHAPE ; MACH NUMBER ; DAYSIDE MAGNETOPAUSE ; STANDOFF DISTANCE ; FLARING ANGLE ; 3-D SHAPE ; POSITION ; LOCATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000187898400006
公开日期	2012-08-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/4599]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	1.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
推荐引用方式 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.