Artículo
Sub-THz and Hα activity during the preflare and main phases of a GOES class M2 event
Kaufmann, Pierre; Marcon, Rogério; Giménez De Castro, C. Guillermo; White, Stephen M.; Raulin, Jean Pierre; Correia, Emilia; Fernandes, Luis Olavo; De Souza, Rodney V.; Godoy, Rodolfo Alfredo
; Marun, Adolfo Hector
; Pereyra, Pablo Florencio
Fecha de publicación:
12/2011
Editorial:
IOP Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Radio and optical observations of the evolution of flare-associated phenomena have shown an initial and rapid burst at 0.4THz only followed subsequently by a localized chromospheric heating producing an Hα brightening with later heating of the whole active region. A major instability occurred several minutes later producing one impulsive burst at microwaves only, associated with an M2.0 GOES X-ray flare that exhibited the main Hα brightening at the same site as the first flash. The possible association between long-enduring time profiles at soft X-rays, microwaves, Hα, and sub-THz wavelengths is discussed. In the decay phase, the Hα movie shows a disrupting magnetic arch structure ejecting dark, presumably chromospheric, material upward. The time sequence of events suggests genuine interdependent and possibly non-thermal instabilities triggering phenomena, with concurrent active region plasma heating and material ejection.
Palabras clave:
SUN: ACTIVITY
,
SUN: FLARES
,
SUN: RADIO RADIATION
,
SUN: X-RAYS, GAMMA RAYS
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Articulos(CASLEO)
Articulos de COMPLEJO ASTRONOMICO "EL LEONCITO"
Articulos de COMPLEJO ASTRONOMICO "EL LEONCITO"
Citación
Kaufmann, Pierre; Marcon, Rogério; Giménez De Castro, C. Guillermo; White, Stephen M.; Raulin, Jean Pierre; et al.; Sub-THz and Hα activity during the preflare and main phases of a GOES class M2 event; IOP Publishing; Astrophysical Journal; 742; 2; 12-2011; 106-110
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