Naslov
The drag based model of ICME propagation

Autori
Dumbović, Mateja ; Vršnak, Bojan ; Žic, Tomislav ; Vrbanec, Dijana ; Veronig, Astrid ; Temmer, Manuela ; Rollett, Tanja ; Moestl, Christian ; Moon, Y.-J.

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

Skup
Solar Influences on the Magnetosphere, Ionosphere and Atmosphere

Mjesto i datum
Sozopol, Bugarska, 06.06.2011. - 10.06.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
interplanetary coronal mass ejections ; magnetohydrodynamic drag

Sažetak
One of central issues of space weather is the propagation of interplanetary coronal mass ejections (ICMEs). At the heliospheric distances beyond R=20 solar radii the “aerodynamic” drag is presumably the dominant force governing ICME propagation ; therefore, a drag based model (DBM) was established, which can be used to forecast the ICME arrival at the Earth. First, the model was tested on a sample of CMEs by combining remote observations of the CME take-off gained by the LASCO onboard SOHO, and in situ measurements from ACE and Wind satellites. The results of the DBM were compared to observational data and a fairly good agreement of the two was found. The model was then tested against STEREO observations. The ICME kinematics was inferred from STEREO observations by applying the Harmonic Mean method and compared to the DBM results. In this way we were able to reproduce the propagation of both slow and fast ICMEs, as well as to identify ICME- ICME interactions and a transition from fast-to-slow solar wind regimes. Finally, a statistical study was performed, where parameters were varied within a model in order to obtain optimal values, for which the average difference in the observed and calculated TT is zero (O-C=0) and the O-C scatter gets minimum. The source of the scatter in O–C values was investigated. The research leading to the results presented in this paper has received funding from European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 218816.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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