Počet záznamů: 1
Statistical analysis of mirror mode waves in sheath regions driven by interplanetary coronal mass ejection
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SYSNO ASEP 0501832 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Statistical analysis of mirror mode waves in sheath regions driven by interplanetary coronal mass ejection Tvůrce(i) Ala-Lahti, M.M. (FI)
Kilpua, E. K. J. (FI)
Dimmock, A.P. (FI)
Osmane, A. (FI)
Pulkkinen, T. (FI)
Souček, Jan (UFA-U) RID, ORCIDCelkový počet autorů 6 Zdroj.dok. Annales Geophysicae. - : Copernicus - ISSN 0992-7689
Roč. 36, č. 3 (2018), s. 793-808Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova interplanetary physics ; plasma waves and turbulence ; solar wind plasma ; space plasma physics ; waves and instabilities Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA17-08772S GA ČR - Grantová agentura ČR Institucionální podpora UFA-U - RVO:68378289 UT WOS 000433126600001 EID SCOPUS 85047483420 DOI 10.5194/angeo-36-793-2018 Anotace 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 Alfven 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. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2019
Počet záznamů: 1