Naslov
MLT Dependence in the Relationship between Plasmapause, Solar Wind and Geomagnetic Activity Based on CRRES, CLUSTER and THEMIS - the Newest Results
(MLT Dependence in the Relationship between Plasmapause, Solar Wind and Geomagnetic Activity Based on CRRES and THEMIS - the Newest Results)

Autori
Verbanac, Giuliana ; Bandić, Mario ; Pierrard, Viviane

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XIVth Hvar Astrophysical Colloquium Solar and Solar-Terrestrial Physics : Now and in the future : abstracts, p. 56 / - , 2016, 1-2

Skup
Hvar Astrophysical Colloquium Solar and Solar-Terrestrial Physics : Now and in the future (14: 2016)

Mjesto i datum
Hvar, Hrvatska, 26.09.2016. - 29.09.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
plasmapause, solar wind, geomagnetic indices, CRESS, THEMIS, CLUSTER satellites

Sažetak
Using database of CRRES, CLUSTER, and THEMIS in situ observations of the plasmapause crossings, we develop linear and more complex plasmapause models parametrized by (a) solar wind parameters V (solar wind velocity), BV (where B is the magnitude of the interplanetary magnetic field IMF), and $dΦ/dt$ (which combines different physical mechanisms which run magnetospheric activity), and (b) geomagnetic indices Dst, Ap and AE. The complex models are built by including a first harmonic in MLT. We present results of the cross correlation analyses which provides both the plasmapause shape for different levels of geomagnetic activity (and thus of the magnetospheric convection electric field) and the information of the delays in the MLT response of the plasmapause. The MLT position of the maximal plasmapause extension obtained from CLUSTER, CRRES and THEMIS satellites are discussed and also compared with past works. Based on our results we suggest that the plasmapause is formed by the mechanism of interchange instability motion and that the instability likely propagates much faster during solar maximum than around solar minimum.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

POVEZANOST RADA