The roll-over of heliospheric neutral hydrogen below 100 eV: observations and implications

Galli, André; Wurz, Peter; Schwadron, N. A.; Kucharek, H.; Möbius, E.; Bzowski, M.; Sokół, J. M.; Kubiak, M. A.; Funsten, H. O.; Fuselier, S. A.; McComas, D. J. (2016). The roll-over of heliospheric neutral hydrogen below 100 eV: observations and implications. Astrophysical journal, 821(2), p. 107. Institute of Physics Publishing IOP 10.3847/0004-637x/821/2/107

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We present an improved analysis of the energy spectrum of energetic neutral hydrogen from the heliosheath observed with the IBEX-Lo sensor on the Interstellar Boundary EXplorer from the years 2009 to 2012. This analysis allows us to study the lowest energies between 10 and 100 eV although various background sources are more intense than the targeted signal over broad areas of the sky. The results improve our knowledge of the interaction region between our heliosphere and the interstellar plasma because these neutral atoms are direct messengers from the low-energy plasma in the heliosheath. We find a roll-over of the energy spectrum below 100 eV, which has major implications for the pressure balance of the plasma in the inner heliosheath. The results can also be compared directly with in situ observations of the Voyager 1 and 2 spacecraft

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Galli, André and Wurz, Peter

Subjects:

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

ISSN:

0004-637X

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

28 Oct 2016 15:31

Last Modified:

28 Oct 2016 15:31

Publisher DOI:

10.3847/0004-637x/821/2/107

BORIS DOI:

10.7892/boris.89501

URI:

https://boris.unibe.ch/id/eprint/89501

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