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

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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2016
Materias:
Avalanche models
Hard X-rays, Solar flares
Intermittency
Microwave, Solar flares
Wavelets
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v291_n7_p2003_GimenezdeCastro
http://hdl.handle.net/20.500.12110/paper_00380938_v291_n7_p2003_GimenezdeCastro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00380938_v291_n7_p2003_GimenezdeCastro
record_format dspace
spelling paper:paper_00380938_v291_n7_p2003_GimenezdeCastro2023-06-08T15:02:54Z Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare Avalanche models Hard X-rays, Solar flares Intermittency Microwave, Solar flares Wavelets 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. © 2016, Springer Science+Business Media Dordrecht. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v291_n7_p2003_GimenezdeCastro http://hdl.handle.net/20.500.12110/paper_00380938_v291_n7_p2003_GimenezdeCastro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Avalanche models
Hard X-rays, Solar flares
Intermittency
Microwave, Solar flares
Wavelets
spellingShingle Avalanche models
Hard X-rays, Solar flares
Intermittency
Microwave, Solar flares
Wavelets
Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
topic_facet Avalanche models
Hard X-rays, Solar flares
Intermittency
Microwave, Solar flares
Wavelets
description 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. © 2016, Springer Science+Business Media Dordrecht.
title Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
title_short Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
title_full Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
title_fullStr Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
title_full_unstemmed Analysis of Intermittency in Submillimeter Radio and Hard X-Ray Data During the Impulsive Phase of a Solar Flare
title_sort analysis of intermittency in submillimeter radio and hard x-ray data during the impulsive phase of a solar flare
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v291_n7_p2003_GimenezdeCastro
http://hdl.handle.net/20.500.12110/paper_00380938_v291_n7_p2003_GimenezdeCastro
_version_ 1768544264755609600

Ejemplares similares