Articles | Volume 36, issue 2
https://doi.org/10.5194/angeo-36-445-2018
https://doi.org/10.5194/angeo-36-445-2018
Regular paper
 | 
21 Mar 2018
Regular paper |  | 21 Mar 2018

Neutralized solar wind ahead of the Earth's magnetopause as contribution to non-thermal exospheric hydrogen

Hans J. Fahr, Uwe Nass, Robindro Dutta-Roy, and Jochen H. Zoennchen

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Latest update: 02 Apr 2025
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Short summary
We investigate what fraction of the hot hydrogen atoms recently found from Lyman-alpha measurements in the Earth's upper exosphere could have their origin as energetic neutral atoms via charge exchange from protons of the shocked solar wind ahead of the magnetopause. Our calculations show that this contribution, although definitely present at larger exospheric heights, cannot explain the observations at lower altitudes.
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