INVESTIGADORES
MANDRINI Cristina Hemilse
congresos y reuniones científicas
Título:
On the importance of magnetic helicity in the CME initiation process
Autor/es:
VAN DRIEL-GESZTELYI, L.; DÉMOULIN, P.; MANDRINI, C.H.; GREEN, L.M.; LÓPEZ FUENTES, M.C.; POEDTS, S.
Lugar:
Noordwijk
Reunión:
Congreso; Space Weather Workshop: Looking Towards a European Space Weather Programme; 2001
Institución organizadora:
ESA
Resumen:
An important role of CMEs is that they carry away magnetic
helicity, which would otherwise accumulate incessantly
in the Sun. Some active regions produce many
CMEs, and others far less during their entire existence.
Searching for the underlying cause of the differences in
CME productivity, we find strong indications that magnetic
helicity levels play a very important role in this.
Based on observations and model calculations of two
well-studied CME prolific active regions (NOAA 7978
in July-November 1996 and NOAA 8100 in November
1997-March 1998) we evaluate the relative importance
of different mechanisms for helicity input in these active
regions. The latter can provide clues to the understanding
of the differences in their helicity output, i.e. in the
number of CMEs they produce. Such studies are aimed
at improving our forecasting ability of CMEs.
