Sub-THz and Hα activity during the preflare and main phases of a GOES class M2 event

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dc.contributor.authorKaufmann P.
dc.contributor.authorMarcon R.
dc.contributor.authorGimenez De Castro C.G.
dc.contributor.authorWhite S.M.
dc.contributor.authorRaulin J.-P.
dc.contributor.authorCorreia E.
dc.contributor.authorFernandes L.O.
dc.contributor.authorDe Souza R.V.
dc.contributor.authorGodoy R.
dc.contributor.authorMarun A.
dc.contributor.authorPereyra P.
dc.date.accessioned2024-03-13T01:10:00Z
dc.date.available2024-03-13T01:10:00Z
dc.date.issued2011
dc.description.abstractRadio 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. © 2011. The American Astronomical Society. All rights reserved.
dc.description.issuenumber2
dc.description.volume742
dc.identifier.doi10.1088/0004-637X/742/2/106
dc.identifier.issn1538-4357
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36917
dc.relation.ispartofAstrophysical Journal
dc.rightsAcesso Aberto
dc.subject.otherlanguageSun: activity
dc.subject.otherlanguageSun: flares
dc.subject.otherlanguageSun: radio radiation
dc.subject.otherlanguageSun: X-rays, gamma rays
dc.titleSub-THz and Hα activity during the preflare and main phases of a GOES class M2 event
dc.typeArtigo
local.scopus.citations6
local.scopus.eid2-s2.0-81255147891
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=81255147891&origin=inward
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