Statistical analysis of mirror mode waves in sheath regions driven by interplanetary coronal mass ejection

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Ala-Lahti, Matti M. Kilpua, Emilia K.J. DImmock, Andrew P. Osmane, Adnane Pulkkinen, Tuija Souček, Jan 2018-06-18T09:18:03Z 2018-06-18T09:18:03Z 2018-05-24
dc.identifier.citation Ala-Lahti , M M , Kilpua , E K J , DImmock , A P , Osmane , A , Pulkkinen , T & Souček , J 2018 , ' Statistical analysis of mirror mode waves in sheath regions driven by interplanetary coronal mass ejection ' Annales Geophysicae , vol 36 , no. 3 , pp. 793-808 . DOI: 10.5194/angeo-36-793-2018 en
dc.identifier.issn 0992-7689
dc.identifier.issn 1432-0576
dc.identifier.other PURE UUID: 0ca8ed52-85a4-4838-8a9a-f38c3837ce44
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description | openaire: EC/H2020/4100103/EU//SolMAG
dc.description.abstract We present a comprehensive statistical analysis of mirror mode waves and the properties of their plasma surroundings in sheath regions driven by interplanetary coronal mass ejection (ICME). We have constructed a semi-automated method to identify mirror modes from the magnetic field data. We analyze 91 ICME sheath regions from January 1997 to April 2015 using data from the Wind spacecraft. The results imply that similarly to planetary magnetosheaths, mirror modes are also common structures in ICME sheaths. However, they occur almost exclusively as dip-like structures and in mirror stable plasma. We observe mirror modes throughout the sheath, from the bow shock to the ICME leading edge, but their amplitudes are largest closest to the shock. We also find that the shock strength (measured by Alfvén Mach number) is the most important parameter in controlling the occurrence of mirror modes. Our findings suggest that in ICME sheaths the dominant source of free energy for mirror mode generation is the shock compression. We also suggest that mirror modes that are found deeper in the sheath are remnants from earlier times of the sheath evolution, generated also in the vicinity of the shock. en
dc.format.extent 16
dc.format.extent 793-808
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation info:eu-repo/grantAgreement/EC/H2020/4100103/EU//SolMAG
dc.relation.ispartofseries Annales Geophysicae en
dc.relation.ispartofseries Volume 36, issue 3 en
dc.rights openAccess en
dc.subject.other Astronomy and Astrophysics en
dc.subject.other Geology en
dc.subject.other Atmospheric Science en
dc.subject.other Earth and Planetary Sciences (miscellaneous) en
dc.subject.other Space and Planetary Science en
dc.subject.other 1171 Geosciences en
dc.title Statistical analysis of mirror mode waves in sheath regions driven by interplanetary coronal mass ejection en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department University of Helsinki
dc.contributor.department Department of Electronics and Nanoengineering
dc.contributor.department Czech Academy of Sciences
dc.subject.keyword Interplanetary physics (plasma waves and turbulence; solar wind plasma)
dc.subject.keyword space plasma physics (waves and instabilities)
dc.subject.keyword Astronomy and Astrophysics
dc.subject.keyword Geology
dc.subject.keyword Atmospheric Science
dc.subject.keyword Earth and Planetary Sciences (miscellaneous)
dc.subject.keyword Space and Planetary Science
dc.subject.keyword 1171 Geosciences
dc.identifier.urn URN:NBN:fi:aalto-201806183297
dc.identifier.doi 10.5194/angeo-36-793-2018
dc.type.version publishedVersion

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