Energetic neutral atoms from the Earth's subsolar magnetopause

Fuselier, S. A.; Funsten, H. O.; Heirtzler, D.; Janzen, P.; Kucharek, H.; McComas, D. J.; Möbius, E.; Moore, T. E.; Petrinec, S. M.; Reisenfeld, D. B.; Schwadron, N. A.; Trattner, K. J.; Wurz, P. (2010). Energetic neutral atoms from the Earth's subsolar magnetopause. Geophysical Research Letters, 37(13), n/a-n/a. American Geophysical Union 10.1029/2010gl044140

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The shocked solar wind in the Earth's magnetosheath becomes nearly stationary at the subsolar magnetopause. At this location, solar wind protons are neutralized by charge exchange with neutral hydrogen atoms at the extreme limits of the Earth's tenuous exosphere. The resulting Energetic Neutral Atoms (ENAs) propagate away from the subsolar region in nearly all directions. Simultaneous observations of hydrogen ENAs from the Interstellar Boundary Explorer (IBEX) and proton distributions in the magnetosheath from the Cluster spacecraft are used to quantify this charge exchange process. By combining these observations with a relatively simple model, estimates are obtained for the ratio of ENA to shocked solar wind flux (about 10−4) and the exospheric density at distances greater than 10 Earth Radii (RE) upstream from the Earth (about 8 cm−3).

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Wurz, Peter

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

09 Jun 2021 12:23

Last Modified:

13 Jun 2021 03:05

Publisher DOI:

10.1029/2010gl044140

BORIS DOI:

10.48350/154417

URI:

https://boris.unibe.ch/id/eprint/154417

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