Observation of Solar Wind Charge Exchange Emission from Exospheric Material in and Outside Earth's Magnetosheath 2008 September 25

Details Observation of Solar Wind Charge Exchange Emission from Exospheric Material in and Outside Earth's Magnetosheath 2008 September 25 Observation of Solar Wind Charge Exchange Emission from Exospheric Material in and Outside Earth's Magnetosheath 2008 September 25

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...691..372s&link_type=abstract

The Astrophysical Journal, Volume 691, Issue 1, pp. 372-381 (2009).

Astronomy and Astrophysics

Astronomy

7

Interplanetary Medium, Solar System: General, Solar Wind, X-Rays: General, X-Rays: Ism

Scientific paper

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.

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