Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorJärvinen, Rikuen_US
dc.contributor.authorAlho, Markkuen_US
dc.contributor.authorKallio, Esaen_US
dc.contributor.authorPulkkinen, Tuijaen_US
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.groupauthorTuija Pulkkinen Groupen
dc.contributor.groupauthorEsa Kallio Groupen
dc.date.accessioned2020-06-25T08:40:14Z
dc.date.available2020-06-25T08:40:14Z
dc.date.issued2020-06-16en_US
dc.description.abstractWe study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationJärvinen, R, Alho, M, Kallio, E & Pulkkinen, T 2020, ' Oxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Waves ', Geophysical Research Letters, vol. 47, no. 11, e2020GL087462 . https://doi.org/10.1029/2020GL087462en
dc.identifier.doi10.1029/2020GL087462en_US
dc.identifier.issn0094-8276
dc.identifier.issn1944-8007
dc.identifier.otherPURE UUID: 89e9c122-1055-443c-9aa6-bf8c11bc488den_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/89e9c122-1055-443c-9aa6-bf8c11bc488den_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/43712356/Jarvinen_Oxygen_ion_escape_from_venus_is_modulated.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45169
dc.identifier.urnURN:NBN:fi:aalto-202006254126
dc.language.isoenen
dc.publisherAMERICAN GEOPHYSICAL UNION
dc.relation.ispartofseriesGeophysical Research Lettersen
dc.relation.ispartofseriesVolume 47, issue 11en
dc.rightsopenAccessen
dc.titleOxygen Ion Escape from Venus is Modulated by Ultra-Low-Frequency Wavesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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