Počet záznamů: 1
Non-stationarity of the quasi-perpendicular bow shock: comparison between Cluster observations and simulations
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SYSNO ASEP 0360928 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Non-stationarity of the quasi-perpendicular bow shock: comparison between Cluster observations and simulations Tvůrce(i) Comisel, H. (RO)
Scholer, M. (DE)
Souček, Jan (UFA-U) RID, ORCID
Matsukiyo, S. (JP)Zdroj.dok. Annales Geophysicae. - : Copernicus - ISSN 0992-7689
Roč. 29, č. 2 (2011), s. 263-274Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova bow shock ; Cluster ; plasma waves ; shock waves Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000287800700005 DOI 10.5194/angeo-29-263-2011 Anotace We performed full particle electromagnetic simulations of a quasi-perpendicular shock with parameters corresponding to the Earth's bow shock observed by Cluster on 24 January 2001. In run 1, modified two-stream instability (MTSI) is excited by the reflected solar wind ions. The waves due to the MTSI are on the whistler mode branch and have downstream directed phase velocities in the shock frame. The Poynting flux far upstream in the foot is also directed downstream. However, in the density and magnetic field compression region of the overshoot the waves are refracted and the Poynting flux in the shock frame points upstream. The MTSI is suppressed in the low mass ratio run 2, where significant reformation (“breathing”) is observed. It is suggested that the high frequency upstream waves are due to the MTSI and are not related to a nonlinear phase standing whistler. Different profiles observed by different Cluster spacecraft are due to the non-stationary behavior on a larger time scale. 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 2012 Elektronická adresa http://www.ann-geophys.net/29/263/2011/angeo-29-263-2011.pdf
Počet záznamů: 1