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Driel-Gesztelyi, L.v.; Démoulin, P.; Mandrini, C.H.; Plunkett, S.; Thompson, B.; Kovári, Zs.; Aulanier, G.; Young, A.; López Fuentes, M.; Poedts, S. "Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave" (2002) COSPAR Colloquia Series. 13(C):143-146
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Abstract:

Through a multi-wavelength and multi-instrument analysis we evaluate the magnetic helicity budget of an isolated active region (NOAA 7978) from its emergence throughout its decay. Using Yohkoh/ SXT images and linear force-free magnetic extrapolations carried out on SOHO/MDI magnetograms, we compute the relative magnetic helicity in the corona. Based on the observed magnetic field distribution we calculate the magnetic helicity injected by differential rotation. Then, using SOHO/LASCO & EIT and SXT images we identify all the 26 coronal mass ejections (CMEs) which originated from this active region during its lifetime and we estimate the amount of helicity which was shed via CMEs. Comparing these three values we find that the differential rotation can neither provide enough helicity to account for the diagnosed coronal helicity values, nor for the helicity carried away by CMEs. We suggest that the main source of the magnetic helicity must be the inherent twist of the magnetic flux tube forming the active region. © 2002 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave
Autor:Driel-Gesztelyi, L.v.; Démoulin, P.; Mandrini, C.H.; Plunkett, S.; Thompson, B.; Kovári, Zs.; Aulanier, G.; Young, A.; López Fuentes, M.; Poedts, S.
Filiación:Centre for Plasma Astrophysics, K. U. Leuven, 3001 Leuven, Belgium
MSSL, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, United Kingdom
Observatoire de Paris, LESIA, F-92195 Meudon, France
Konkoly Observatory, H-1525 Budapest, Hungary
Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina
Naval Research Laboratory, Washington, DC 20375, United States
NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States
Año:2002
Volumen:13
Número:C
Página de inicio:143
Página de fin:146
DOI: http://dx.doi.org/10.1016/S0964-2749(02)80037-3
Título revista:COSPAR Colloquia Series
Título revista abreviado:COSPAR Colloq. Ser.
ISSN:09642749
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09642749_v13_nC_p143_DrielGesztelyi

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Citas:

---------- APA ----------
Driel-Gesztelyi, L.v., Démoulin, P., Mandrini, C.H., Plunkett, S., Thompson, B., Kovári, Zs., Aulanier, G.,..., Poedts, S. (2002) . Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave. COSPAR Colloquia Series, 13(C), 143-146.
http://dx.doi.org/10.1016/S0964-2749(02)80037-3
---------- CHICAGO ----------
Driel-Gesztelyi, L.v., Démoulin, P., Mandrini, C.H., Plunkett, S., Thompson, B., Kovári, Zs., et al. "Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave" . COSPAR Colloquia Series 13, no. C (2002) : 143-146.
http://dx.doi.org/10.1016/S0964-2749(02)80037-3
---------- MLA ----------
Driel-Gesztelyi, L.v., Démoulin, P., Mandrini, C.H., Plunkett, S., Thompson, B., Kovári, Zs., et al. "Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave" . COSPAR Colloquia Series, vol. 13, no. C, 2002, pp. 143-146.
http://dx.doi.org/10.1016/S0964-2749(02)80037-3
---------- VANCOUVER ----------
Driel-Gesztelyi, L.v., Démoulin, P., Mandrini, C.H., Plunkett, S., Thompson, B., Kovári, Zs., et al. Helicity loading and dissipation: The helicity budget of ar 7978 from the cradle to the grave. COSPAR Colloq. Ser. 2002;13(C):143-146.
http://dx.doi.org/10.1016/S0964-2749(02)80037-3