Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare

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dc.contributor.authorGimenezdeCastro G.
dc.contributor.authorSimoes P.J.A.
dc.contributor.authorRaulin J.-P.
dc.contributor.authorGuimaraes O.M.
dc.date.accessioned2024-03-13T00:52:46Z
dc.date.available2024-03-13T00:52:46Z
dc.date.issued2016
dc.description.abstract© 2016, Springer Science+Business Media Dordrecht.We present an analysis of intermittent processes occurring during the impulsive phase of the flare SOL2012-03-13, using hard X-rays and submillimeter radio data. Intermittency is a key characteristic in turbulent plasmas and has so far only been analyzed for hard X-ray data. Since in a typical flare the same accelerated electron population is believed to produce both hard X-rays and gyrosynchrotron radiation, we compare the two time profiles by searching for intermittency signatures. For this, we define a cross-wavelet power spectrum, which is used to obtain the local intermittency measure, or LIM. When greater than three, the square LIM coefficients indicate a local intermittent process. The LIM2 coefficient distribution in time and scale helps to identify avalanche or cascade energy release processes. We find two different and well-separated intermittent behaviors in the submillimeter data: for scales greater than 20 s, a broad distribution during the rising and maximum phases of the emission seems to favor a cascade process; for scales below 1 s, short pulses centered on the peak time are representative of avalanches. When applying the same analysis to hard X-rays, we find that only the scales above 10 s produce a distribution related to a cascade energy fragmentation. Our results suggest that different acceleration mechanisms are responsible for tens of keV and MeV energy ranges of electrons.
dc.description.firstpage2003
dc.description.issuenumber7
dc.description.lastpage2016
dc.description.volume291
dc.identifier.doi10.1007/s11207-016-0949-3
dc.identifier.issn0038-0938
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35948
dc.relation.ispartofSolar Physics
dc.rightsAcesso Restrito
dc.subject.otherlanguageAvalanche models
dc.subject.otherlanguageHard X-rays, Solar flares
dc.subject.otherlanguageIntermittency
dc.subject.otherlanguageMicrowave, Solar flares
dc.subject.otherlanguageWavelets
dc.titleAnalysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
dc.typeArtigo
local.scopus.citations1
local.scopus.eid2-s2.0-84978772041
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84978772041&origin=inward
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