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dc.contributor.author
Giménez de Castro, C. G.
dc.contributor.author
Raulin, J. P.
dc.contributor.author
Mandrini, Cristina Hemilse
dc.contributor.author
Kaufmann, Pierre
dc.contributor.author
Magun, A.
dc.date.available
2017-08-15T17:12:53Z
dc.date.issued
2001-01
dc.identifier.citation
Giménez de Castro, C. G.; Raulin, J. P.; Mandrini, Cristina Hemilse; Kaufmann, Pierre; Magun, A.; Multi-resolution wavelet analysis of high time resolution millimeter wavelength observations of solar bursts; EDP Sciences; Astronomy and Astrophysics; 366; 1; 1-2001; 317-325
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/22477
dc.description.abstract
By means of the wavelet representation of multi-resolution analysis, we study millimeter wavelength (mm-w) radio solar bursts obtained at 48 GHz with high time resolution (<=8 ms); observed at Itapetinga (Brazil). The multi-resolution analysis decomposes the signal locally both in time and in frequency, allowing us to identify the different temporal structures which underlie the flux density time series and the transient phenomena characteristic of solar bursts. The analysis was applied to the flux time profile of four solar bursts observed at a mm-w, studying separately the pre-flare, impulsive and post-flare phases when possible. We find that a wide range of time scales contributes to the radio flux. The minimum time scale found for the impulsive phase is 32 ms, after which the noise dominates the emission; the maximum is 8 s. Pre- and post-flare phases have a minimum time scale of 256 ms and a maximum between 1 to 8 s. Multi-resolution ``spectral indexes'', which are a measure of the self-similar behavior of the signal, are in some cases bigger for the impulsive phase than for the pre- and post-flare phases. We find that as the flux becomes higher the contribution from shorter time scales is enhanced.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Solar Flares
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Solar Radio Radiation
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Solar Data Analysis
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Multi-resolution wavelet analysis of high time resolution millimeter wavelength observations of solar bursts
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-08-14T17:43:59Z
dc.journal.volume
366
dc.journal.number
1
dc.journal.pagination
317-325
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Giménez de Castro, C. G.. Instituto Presbiteriano Mackenzie; Brasil
dc.description.fil
Fil: Raulin, J. P.. Instituto Presbiteriano Mackenzie; Brasil
dc.description.fil
Fil: Mandrini, Cristina Hemilse. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Kaufmann, Pierre. Instituto Presbiteriano Mackenzie; Brasil
dc.description.fil
Fil: Magun, A.. University of Berne; Suiza
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:20000088
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2001/04/aa8452/aa8452.html
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