Magnetic cloud-bow shock interaction: WIND and IMP-8 observations

被引：15

作者：

Lepping, RP ^{[1
]}

Szabo, A ^{[1
]}

Ogilvie, KW ^{[1
]}

Fitzenreiter, RJ ^{[1
]}

Lazarus, AJ ^{[1
]}

Steinberg, JT ^{[1
]}

机构：

[1] MIT,CTR SPACE RES,CAMBRIDGE,MA 02139

来源：

GEOPHYSICAL RESEARCH LETTERS | 1996年 / 23卷 / 10期

关键词：

D O I：

10.1029/96GL01287

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

An interplanetary magnetic cloud of typical magnetic field flux rope structure and of diameter 0.23 AU was observed in WIND magnetic field and plasma data of February 8, 1995. Starting at about 1 hour later it was also observed at IMP 8, where the bow shock reached at least 39 R(E) from Earth, on the dusk side, for brief periods within the cloud. This expanded bow shock changed from a perpendicular to pulsation type at IMP-8 as a result of the magnetic field smoothly changing direction within the passing cloud, and its surface normal was nearly, and unexpectedly, invariant during the expansion. It is inferred that, within measurement error, the bow shock's shape expanded almost 'isotropicly' and that the magnetosheath became unusually wide.

引用

页码：1195 / 1198

页数：4

共 19 条

[1]

[Anonymous], 1995, INTERPLANETARY MAGNE

[2]

BURLAGA L, 1981, J GEOPHYS RES-SPACE, V86, P6673, DOI 10.1029/JA086iA08p06673

[3] MAGNETIC CLOUDS AND FORCE-FREE FIELDS WITH CONSTANT-ALPHA [J].