Artículo
Green, L.M.; López Fuentes, M.C.; Mandrini, C.H.; van Driel-Gesztelyi, L.; Démoulin, P. "Active region helicity evolution and related coronal mass ejection activity" (2003) Advances in Space Research. 32(10):1959-1964
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Abstract:
The computation of magnetic helicity has become increasingly important in the studies of solar activity. Observations of helical structures in the solar atmosphere, and their subsequent ejection into the interplanetary medium, have resulted in considerable interest to find the link between the amount of helicity in the coronal magnetic field and the origin of coronal mass ejections (CMEs), which provide a natural method to remove helicity from the corona. Recent works have endeavored to find the source of helicity to explain the observed CME activity in specific cases. The main candidates being differential rotation, shear motions or a transfer of helicity from below the photosphere into the corona. We study and active region for several rotations during 1997 and 1998 to investigate the relative importance of these mechanisms. We find that photospheric differential rotation cannot provide the required magnetic helicity to the corona and the ejected CMEs. Localized photospheric motions can provide a larger helicity flux, though still not sufficient. © 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Active region helicity evolution and related coronal mass ejection activity |
| Autor: | Green, L.M.; López Fuentes, M.C.; Mandrini, C.H.; van Driel-Gesztelyi, L.; Démoulin, P. |
| Filiación: | Mullard Space Science Laboratory, Univ. College London, London RH5 6NT, United Kingdom Inst. Astronomia/Fisica del Espacio, IAFE, CC. 67 Suc. 28, Buenos Aires 1428, Argentina Centre for Plasma Astrophysics, K.U. Leuven, Celestijnenlaan 200B, Heverlee 3001, Belgium Observatoire de Paris, LESIA, FRE 2461 (CNRS), Meudon Cedex, France Konkoly Observatory, Budapest, Hungary |
| Palabras clave: | Magnetic fields; Sun; Coronal mass ejections (CME); Magnetic helicity; Space research; corona |
| Año: | 2003 |
| Volumen: | 32 |
| Número: | 10 |
| Página de inicio: | 1959 |
| Página de fin: | 1964 |
| DOI: | http://dx.doi.org/10.1016/S0273-1177(03)90633-8 |
| Título revista: | Advances in Space Research |
| Título revista abreviado: | Adv. Space Res. |
| ISSN: | 02731177 |
| CODEN: | ASRSD |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v32_n10_p1959_Green |
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Citas:
---------- APA ----------
Green, L.M., López Fuentes, M.C., Mandrini, C.H., van Driel-Gesztelyi, L. & Démoulin, P. (2003) . Active region helicity evolution and related coronal mass ejection activity. Advances in Space Research, 32(10), 1959-1964.http://dx.doi.org/10.1016/S0273-1177(03)90633-8
---------- CHICAGO ----------
Green, L.M., López Fuentes, M.C., Mandrini, C.H., van Driel-Gesztelyi, L., Démoulin, P. "Active region helicity evolution and related coronal mass ejection activity" . Advances in Space Research 32, no. 10 (2003) : 1959-1964.http://dx.doi.org/10.1016/S0273-1177(03)90633-8
---------- MLA ----------
Green, L.M., López Fuentes, M.C., Mandrini, C.H., van Driel-Gesztelyi, L., Démoulin, P. "Active region helicity evolution and related coronal mass ejection activity" . Advances in Space Research, vol. 32, no. 10, 2003, pp. 1959-1964.http://dx.doi.org/10.1016/S0273-1177(03)90633-8
---------- VANCOUVER ----------
Green, L.M., López Fuentes, M.C., Mandrini, C.H., van Driel-Gesztelyi, L., Démoulin, P. Active region helicity evolution and related coronal mass ejection activity. Adv. Space Res. 2003;32(10):1959-1964.http://dx.doi.org/10.1016/S0273-1177(03)90633-8
