Submillimeter-wave and Hα observations of the event on 28 November, 2001

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dc.contributor.authorCristiani G.
dc.contributor.authorMartinez G.
dc.contributor.authorMandrini C.H.
dc.contributor.authorGimenez de Castro C.G.
dc.contributor.authorRovira M.G.
dc.contributor.authorKaufmann P.
dc.contributor.authorLevato H.
dc.date.accessioned2024-03-13T01:43:39Z
dc.date.available2024-03-13T01:43:39Z
dc.date.issued2005
dc.description.abstractWe present a detailed study of a 1B/M6.9 impulsive flare combining high time resolution (1 ms) and instantaneous emission source localization observations at submillimeter frequencies (212 GHz), obtained with the solar submillimeter telescope (SST), and Hα data from the Hα solar telescope for argentina (HASTA). The flare, starting at 16:34 UT, occurred in active region (AR) 9715 (NOAA number) on November 28, 2001, and was followed by an Hα surge. We complement our data with magnetograms from the Michelson Doppler Imager (SOHO/MDI). SST observed a short impulsive burst at 212 GHz, presenting a weak bulk emission (of about 90 sfu) composed of a few shorter duration (<5 s) structures. The integrated Hα and the 212 GHz light curves present a remarkable agreement during the impulsive phase of the event. The delay between both curves stays below 12 s (the time resolution of the Hα telescope). The flare as well as the surge are linked to new flux emergence very close to the main AR bipole. Taking into account the AR magnetic field evolution, we infer that magnetic field reconnection, occurring at low coronal levels, could have been at the origin of the flare; while in the case of surge this would happen at the chromospheric level. © 2005 Elsevier Ltd. All rights reserved.
dc.description.firstpage1744
dc.description.issuenumber17-18 SPEC. ISS.
dc.description.lastpage1750
dc.description.volume67
dc.identifier.doi10.1016/j.jastp.2005.02.025
dc.identifier.issn1364-6826
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37853
dc.relation.ispartofJournal of Atmospheric and Solar-Terrestrial Physics
dc.rightsAcesso Restrito
dc.subject.otherlanguageSun: chromosphere
dc.subject.otherlanguageSun: magnetic field
dc.subject.otherlanguageSun: radio emission
dc.subject.otherlanguageSun: solar flares
dc.titleSubmillimeter-wave and Hα observations of the event on 28 November, 2001
dc.typeArtigo
local.scopus.citations3
local.scopus.eid2-s2.0-29744431940
local.scopus.subjectPhotospheric evolution
local.scopus.subjectSolar flares
local.scopus.subjectSolar submillimeter telescope
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=29744431940&origin=inward
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