Ultra-low frequency waves in the ion foreshock of Mercury: A global hybrid modeling study

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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.accessioned2020-04-03T09:49:17Z
dc.date.available2020-04-03T09:49:17Z
dc.date.issued2020-01-01en_US
dc.description.abstractWe study the solar wind interaction with Mercury using a global three-dimensional hybrid model. In the analysed simulation run, we find a well-developed, dynamic Hermean ion foreshock ahead of the quasi-parallel bow shock under upstream solar wind and interplanetary magnetic field (IMF) conditions corresponding to the orbital perihelion of the planet. A portion of the incident solar wind ion flux is scattered back upstream near the quasi-parallel bow shock including both major solar wind ion species, protons and alphas. The scattered particles form the Hermean suprathermal foreshock ion population. A significant part of the suprathermal population is backstreaming with a velocity component towards the Sun in the near-foreshock at the planetocentric distance of few planetary radii in the plane of the IMF. The ion foreshock is associated with large-scale, oblique fast magnetosonic waves in the ultra-low-frequency (ULF) range convecting downstream with the solar wind. The ULF wave period is about 5 s in the analysed upstream condition case at Mercury, which corresponds to the 30-s foreshock waves at Earth when scaled by the IMF magnitude.en
dc.description.versionPeer revieweden
dc.format.extent4147-4161
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationJärvinen, R, Alho, M, Kallio, E & Pulkkinen, T 2020, ' Ultra-low frequency waves in the ion foreshock of Mercury: A global hybrid modeling study ', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 3, pp. 4147-4161 . https://doi.org/10.1093/mnras/stz3257en
dc.identifier.doi10.1093/mnras/stz3257en_US
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.otherPURE UUID: 7516b040-f827-4b1e-aa25-d78c82a84124en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/7516b040-f827-4b1e-aa25-d78c82a84124en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85104390869&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/41697418/stz3257.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/43666
dc.identifier.urnURN:NBN:fi:aalto-202004032696
dc.language.isoenen
dc.publisherOXFORD UNIV PRESS INC
dc.relation.ispartofseriesMonthly Notices of the Royal Astronomical Societyen
dc.relation.ispartofseriesVolume 491, issue 3en
dc.rightsopenAccessen
dc.subject.keywordmagnetic fieldsen_US
dc.subject.keywordplasmasen_US
dc.subject.keywordwavesen_US
dc.subject.keywordsolar winden_US
dc.subject.keywordplanet-star interactionsen_US
dc.titleUltra-low frequency waves in the ion foreshock of Mercury: A global hybrid modeling studyen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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