Neutral Atom Imaging of the Solar Wind‐Magnetosphere‐Exosphere Interaction Near the Subsolar Magnetopause

Fuselier, S. A.; Dayeh, M. A.; Galli, A.; Funsten, H. O.; Schwadron, N. A.; Petrinec, S. M.; Trattner, K. J.; McComas, D. J.; Burch, J. L.; Toledo‐Redondo, S.; Szalay, J. R.; Strangeway, R. J. (2020). Neutral Atom Imaging of the Solar Wind‐Magnetosphere‐Exosphere Interaction Near the Subsolar Magnetopause. Geophysical Research Letters, 47(19) American Geophysical Union 10.1029/2020gl089362

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Energetic neutral atoms (ENAs) created by charge‐exchange of ions with the Earth's hydrogen exosphere near the subsolar magnetopause yield information on the distribution of plasma in the outer magnetosphere and magnetosheath. ENA observations from the Interstellar Boundary Explorer (IBEX) are used to image magnetosheath plasma and, for the first time, low‐energy magnetospheric plasma near the magnetopause. These images show that magnetosheath plasma is distributed fairly evenly near the subsolar magnetopause; however, low‐energy magnetospheric plasma is not distributed evenly in the outer magnetosphere. Simultaneous images and in situ observations from the Magnetospheric Multiscale (MMS) spacecraft from November 2015 (during the solar cycle declining phase) are used to derive the exospheric density. The ~11–17 cm−3 density at 10 RE is similar to that obtained previously for solar minimum. Thus, these combined results indicate that the exospheric density 10 RE from the Earth may have a weak dependence on solar cycle.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute

UniBE Contributor:

Galli, André


500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics




American Geophysical Union




Dora Ursula Zimmerer

Date Deposited:

25 Feb 2021 12:06

Last Modified:

25 Feb 2021 12:06

Publisher DOI:





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