INVESTIGADORES
CREMADES FERNANDEZ Maria Hebe
congresos y reuniones científicas
Título:
Geometrical Properties of Coronal Mass Ejections
Autor/es:
H. CREMADES; V. BOTHMER
Lugar:
Beijing, China
Reunión:
Simposio; IAU Symposium 226 on Coronal and Stellar Mass Ejections; 2005
Institución organizadora:
IAU
Resumen:
Based on the SOHO/LASCO dataset, a collection of "structured" coronal
mass ejections (CMEs) has been compiled within the period 1996-2002, in
order to analyze their three-dimensional configuration. These CME events
exhibit white-light fine structures, likely indicative of their possible
3D topology. From a detailed investigation of the associated low coronal
and photospheric source regions, a generic scheme has been deduced,
which considers the white-light topology of a CME projected in the plane
of the sky as being primarily dependent on the orientation and position
of the source region's neutral line on the solar disk. The obtained
results imply that structured CMEs are essentially organized along a
symmetry axis, in a cylindrical manner. The measured dimensions of the
cylinder's base and length yield a ratio of 1.6. These CMEs seem to be
better approximated by elliptic cones, rather than by the classical ice
cream cone, characterized by a circular cross section.