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Abstract:

We analyze Hα, UV, and X-ray emissions in and around the spectacular arch system seen in the corona on 1980 March 27 during the Solar Maximum Mission. The flaring of the arch plasma is studied, and its dependence on triggering mechanisms related to the observed small limb flare in the arch foot-point is analyzed. To drive these events, we propose a mechanism in which small electric current circuits and the localized magnetic free energy are continuously generated at a magnetic null by a pressure gradient, which then compress or expand the plasma. This free energy dissipates by Joule effect and upward transport. © 1997. The American Astronomical Society. All rights reserved.

Registro:

Documento: Artículo
Título:Ultraviolet events observed in active regions. II. An interpretation of flaring arches and associated small flares
Autor:Fontenla, J.; Rovira, M.; Tandberg-Hanssen, E.
Filiación:771 West Dahlia Street, Louisville, CO 80027, United States
Instituto de Astronomia y Fisica del Espacio, C.C. 67, Sucersal 28, 1428 Buenos Aires, Argentina
NASA Marshall Space Flight Center, ES01, Huntsville, AL 35812, United States
Palabras clave:Sun: Activity; Sun: Flares; Sun: UV radiation; Sun: X-rays, gamma rays
Año:1997
Volumen:491
Número:2 PART I
Página de inicio:925
Página de fin:932
DOI: http://dx.doi.org/10.1086/304970
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v491_n2PARTI_p925_Fontenla

Referencias:

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Citas:

---------- APA ----------
Fontenla, J., Rovira, M. & Tandberg-Hanssen, E. (1997) . Ultraviolet events observed in active regions. II. An interpretation of flaring arches and associated small flares. Astrophysical Journal, 491(2 PART I), 925-932.
http://dx.doi.org/10.1086/304970
---------- CHICAGO ----------
Fontenla, J., Rovira, M., Tandberg-Hanssen, E. "Ultraviolet events observed in active regions. II. An interpretation of flaring arches and associated small flares" . Astrophysical Journal 491, no. 2 PART I (1997) : 925-932.
http://dx.doi.org/10.1086/304970
---------- MLA ----------
Fontenla, J., Rovira, M., Tandberg-Hanssen, E. "Ultraviolet events observed in active regions. II. An interpretation of flaring arches and associated small flares" . Astrophysical Journal, vol. 491, no. 2 PART I, 1997, pp. 925-932.
http://dx.doi.org/10.1086/304970
---------- VANCOUVER ----------
Fontenla, J., Rovira, M., Tandberg-Hanssen, E. Ultraviolet events observed in active regions. II. An interpretation of flaring arches and associated small flares. Astrophys. J. 1997;491(2 PART I):925-932.
http://dx.doi.org/10.1086/304970