A comparison of empirical and experimental O7+ , O8+ , and O/H values, with applications to terrestrial solar wind charge exchange

Whittaker, I.C. ORCID: 0000-0002-6211-1852 and Sembay, S., 2016. A comparison of empirical and experimental O7+ , O8+ , and O/H values, with applications to terrestrial solar wind charge exchange. Geophysical Research Letters, 43 (14), pp. 7328-7337. ISSN 0094-8276

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Abstract

Solar wind charge exchange occurs at Earth between the neutral planetary exosphere and highly charged ions of the solar wind. The main challenge in predicting the resultant photon flux in the X‐ray energy bands is due to the interaction efficiency, known as the α value. This study produces experimental α values at the Earth, for oxygen emission in the range of 0.5–0.7 keV. Thirteen years of data from the Advanced Composition Explorer are examined, comparing O7+ and O8+ abundances, as well as O/H to other solar wind parameters allowing all parameters in the urn:x-wiley:grl:media:grl54692:grl54692-math-0001 calculation to be estimated based on solar wind velocity. Finally, a table is produced for a range of solar wind speeds giving average O7+ and O8+ abundances, O/H, and urn:x-wiley:grl:media:grl54692:grl54692-math-0002 values.

Item Type: Journal article
Publication Title: Geophysical Research Letters
Creators: Whittaker, I.C. and Sembay, S.
Publisher: Wiley-Blackwell
Date: 28 July 2016
Volume: 43
Number: 14
ISSN: 0094-8276
Identifiers:
NumberType
10.1002/2016gl069914DOI
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 14 Jun 2019 11:24
Last Modified: 09 Aug 2019 11:58
URI: http://irep.ntu.ac.uk/id/eprint/36796

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