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ULF Waves Modulating and Acting as Mass Spectrometer for Dayside Ionospheric Outflow Ions
Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China..
Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China..
Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China..
Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China..
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2019 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 46, no 15, p. 8633-8642Article in journal (Refereed) Published
Abstract [en]

Ionospheric outflow has been shown to be a dominant ion source of Earth's magnetosphere. However, most studies in the literature are about ionospheric outflow injected into the nightside magnetosphere. We still know little about ionospheric outflow injected into the dayside magnetosphere and its further energization after it enters the magnetosphere. Here, with data from Magnetospheric Multiscale mission, we report direct observations of the modulation of dayside ionospheric outflow ions by ultralow frequency (ULF) waves. The observations indicate that the modulation is mass dependent, which demonstrates the possibility of using ULF waves as a mass spectrometer to identify ion species. Moreover, the measurement suggests that polarization drift may play a role in O+ modulation, which may lead to a true acceleration and even nonadiabatic behavior of O+. This interaction scenario can work throughout the whole magnetosphere and impact upon the plasma environment and dynamics.

Place, publisher, year, edition, pages
AMER GEOPHYSICAL UNION , 2019. Vol. 46, no 15, p. 8633-8642
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-260190DOI: 10.1029/2019GL083849ISI: 000483812500006Scopus ID: 2-s2.0-85070968599OAI: oai:DiVA.org:kth-260190DiVA, id: diva2:1355886
Note

QC 20190930

Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-09-30Bibliographically approved

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Lindqvist, Per-Arne

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