OBSERVATION OF SOLAR WIND CHARGE EXCHANGE EMISSION FROM EXOSPHERIC MATERIAL IN AND OUTSIDE EARTH'S MAGNETOSHEATH 2008 SEPTEMBER 25

被引：41

作者：

Snowden, S. L. ^{[1
]}

Collier, M. R. ^{[1
]}

Cravens, T. ^{[2
]}

Kuntz, K. D. ^{[3
]}

Lepri, S. T. ^{[4
]}

Robertson, I. ^{[2
]}

Tomas, L. ^{[5
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[3] Johns Hopkins Univ, Henry A Rowland Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA

[5] European Space Agcy, European Space Astron Ctr, Madrid 28691, Spain

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 691卷 / 01期

关键词：

interplanetary medium; solar system: general; solar wind; X-rays: general; X-rays: ISM; X-RAY-EMISSION; ADVANCED COMPOSITION EXPLORER; XMM-NEWTON; ROSAT PSPC; PICKUP IONS; DIFFUSE; SPECTRA; FIELD; HELIOSPHERE; SPACECRAFT;

D O I：

10.1088/0004-637X/691/1/372

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A long XMM-Newton exposure is used to observe solar wind charge exchange (SWCX) emission from exospheric material in and outside Earth's magnetosheath. The light curve of the O VII (0.5-0.62 keV) band is compared with a model for the expected emission, and while the emission is faint and the light curve has considerable scatter, the correlation is significant to better than 99.9%. This result demonstrates the validity of the geocoronal SWCX emission model for predicting a contribution to astrophysical observations to a scale factor of order unity (1.5). In addition, an average value of the SWCX O VII emission from the magnetosheath over the observation of 2.6 +/- 0.5 LU is derived. The results also demonstrate the potential utility of using X-ray observations to study global phenomena of the magnetosheath which currently are only investigated using in situ measurements.

引用

页码：372 / 381

页数：10

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