Artículos de revistas
SUB-THz AND H alpha ACTIVITY DURING THE PREFLARE AND MAIN PHASES OF A GOES CLASS M2 EVENT
Registro en:
Astrophysical Journal. Iop Publishing Ltd, v. 742, n. 2, 2011.
0004-637X
WOS:000297211900046
10.1088/0004-637X/742/2/106
Autor
Kaufmann, P
Marcon, R
de Castro, CGG
White, SM
Raulin, JP
Correia, E
Fernandes, LO
de Souza, RV
Godoy, R
Marun, A
Pereyra, P
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Radio and optical observations of the evolution of flare-associated phenomena have shown an initial and rapid burst at 0.4 THz only followed subsequently by a localized chromospheric heating producing an Ha 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 Ha brightening at the same site as the first flash. The possible association between long-enduring time profiles at soft X-rays, microwaves, Ha, and sub-THz wavelengths is discussed. In the decay phase, the Ha 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. 742 2 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Brazilian agency Mackepesquisa Argentina agency CONICET US agency AFOSR Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)