Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 36, issue 2
Articles | Volume 36, issue 2
https://doi.org/10.5194/angeo-36-445-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-36-445-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 36, issue 2
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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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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