HR: 0800h
AN: SH31A-0234    [Abstracts]
TI: Transport in the Interplanetary Medium of Coronal Mass Ejections
AU: * Borgazzi, A I
EM: andrea@dge.inpe.br
AF: National Institute of Space Investigation, Av. dos Astronautas 1758, San Jose dos Campos, SP 12227-010, Brazil
AU: Lara, A
EM: alara@geofisica.unam.mx
AF: National Autonomous University of Mexico, Ciudad Universitaria. Del Coyoacán México D.F, Mexico, DF 04510, Mexico
AU: Echer, E
EM: echer@dge.inpe.br
AF: National Institute of Space Investigation, Av. dos Astronautas 1758, San Jose dos Campos, SP 12227-010, Brazil
AU: Alves, M V
EM: virginia@plasma.inpe.br
AF: National Institute of Space Investigation, Av. dos Astronautas 1758, San Jose dos Campos, SP 12227-010, Brazil
AB: Coronal mass ejections (CMEs) are large scale structures of plasma and magnetic field expelled from the Sun, generally observed with coronographs in white light,and which are ejected into the interplanetary medium with a wide range of speeds. Due to its interaction with the surrounding medium, the interplanetary remmants of CMEs (ICMEs) suffer possitive or negative acceleration depending on their initial speed. This process of acceleration can be understood as a momentum transference between the ICMEs and the ambient solar wind. In this work, we consider the motion of an ICME in the solar wind as the motion of two immiscible fluids. An analytical study of the role of the drag force in the process of momentum interchange is presented. By comparing the analytical results with observations we obtain a good estimation of the drag coefficient.
DE: 2101 Coronal mass ejections (7513)
DE: 7513 Coronal mass ejections (2101)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting