Artículo

Van Driel-Gesztelyi, L.; Manoharan, P.K.; Démoulin, P.; Aulanier, G.; Mandrini, C.H.; Lopez-Fuentes, M.; Schmieder, B.; Orlando, S.; Thompson, B.; Plunkett, S. "Initiation of CMEs: The role of magnetic twist" (2000) Journal of Atmospheric and Solar-Terrestrial Physics. 62(16):1437-1448
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Abstract:

Recent multiwavelength observations, modelling results and theoretical developments indicate the importance of twisted magnetic configurations in solar active regions (ARs) in the initiation of coronal mass ejections (CMEs). Through multiwavelength analysis of a few representative events we make an attempt to provide constraints for CME models. The two events presented here in detail start with the expansion of sigmoids (S- or inverse S-shaped loops) observed in soft X-rays. Both events (on 25 October 1994 and 14 October 1995) occurred before the launch of the SOHO spacecraft, but indirect evidences (i.e. signatures of an outward propagation traced up to ≈20 solar radii and an associated magnetic cloud) suggest that both of them were related to CMEs. We show evidence that sigmoids are the coronal manifestations of twisted magnetic flux tubes, which start expanding presumably due to a loss of equilibrium. It is noteworthy that the analysed CMEs occurred in a complex (not simply bipolar) magnetic environment and in all cases we found evidences of the interaction (magnetic reconnection) with the surrounding fields. We propose a scenario for sigmoid expansion related CME events and suggest that twisted magnetic configurations are good candidates for being source regions of CMEs. © 2000 Elsevier Science B.V.

Registro:

Documento: Artículo
Título:Initiation of CMEs: The role of magnetic twist
Autor:Van Driel-Gesztelyi, L.; Manoharan, P.K.; Démoulin, P.; Aulanier, G.; Mandrini, C.H.; Lopez-Fuentes, M.; Schmieder, B.; Orlando, S.; Thompson, B.; Plunkett, S.
Filiación:Observatoire de Paris, D.A.S.O.P., F-92195, Meudon, France
Konkoly Observatory, Pf. 67, H-1525, Budapest, Hungary
Radio Astronomy Centre (NCRA), Tata Inst. Fundamental Res., (Ooty), Udhagamandalam, India
NRL, Code 7670, Washington, DC 20375, United States
GMU, CSI, 4400 University Dr., Fairfax, VA 22030, United States
IAFE-CONICET, CC.67, Suc.28, 1428, Buenos Aires, Argentina
University of Oslo, N-0315, Oslo, Norway
Osserv. Astron. Palermo g.S. Vaiana, I-90134, Palermo, Italy
NASA / Goddard SFC, Greenbelt, MD 20771, United States
USRA, Naval Research Laboratory, Washington, DC 20375, United States
Palabras clave:Coronal mass ejections; Magnetic twist
Año:2000
Volumen:62
Número:16
Página de inicio:1437
Página de fin:1448
DOI: http://dx.doi.org/10.1016/S1364-6826(00)00087-0
Título revista:Journal of Atmospheric and Solar-Terrestrial Physics
Título revista abreviado:J. Atmos. Sol.-Terr. Phys.
ISSN:13646826
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13646826_v62_n16_p1437_VanDrielGesztelyi

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Citas:

---------- APA ----------
Van Driel-Gesztelyi, L., Manoharan, P.K., Démoulin, P., Aulanier, G., Mandrini, C.H., Lopez-Fuentes, M., Schmieder, B.,..., Plunkett, S. (2000) . Initiation of CMEs: The role of magnetic twist. Journal of Atmospheric and Solar-Terrestrial Physics, 62(16), 1437-1448.
http://dx.doi.org/10.1016/S1364-6826(00)00087-0
---------- CHICAGO ----------
Van Driel-Gesztelyi, L., Manoharan, P.K., Démoulin, P., Aulanier, G., Mandrini, C.H., Lopez-Fuentes, M., et al. "Initiation of CMEs: The role of magnetic twist" . Journal of Atmospheric and Solar-Terrestrial Physics 62, no. 16 (2000) : 1437-1448.
http://dx.doi.org/10.1016/S1364-6826(00)00087-0
---------- MLA ----------
Van Driel-Gesztelyi, L., Manoharan, P.K., Démoulin, P., Aulanier, G., Mandrini, C.H., Lopez-Fuentes, M., et al. "Initiation of CMEs: The role of magnetic twist" . Journal of Atmospheric and Solar-Terrestrial Physics, vol. 62, no. 16, 2000, pp. 1437-1448.
http://dx.doi.org/10.1016/S1364-6826(00)00087-0
---------- VANCOUVER ----------
Van Driel-Gesztelyi, L., Manoharan, P.K., Démoulin, P., Aulanier, G., Mandrini, C.H., Lopez-Fuentes, M., et al. Initiation of CMEs: The role of magnetic twist. J. Atmos. Sol.-Terr. Phys. 2000;62(16):1437-1448.
http://dx.doi.org/10.1016/S1364-6826(00)00087-0