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Please use this identifier to cite or link to this item: http://hdl.handle.net/2108/599

Title: Radiative properties of complex magnetic elements in the solar photosphere
Authors: Rast, Mark
Berrilli, Francesco
Criscuoli, Serena
Keywords: sole
contrasto facolare
tubi di flusso magnetico
simulazioni numeriche
trasporto radiativo
short characteristic
dimensione frattale
tecniche di segmentazione
facolae
tecniche di integrazione numerica
Issue Date: 29-Aug-2008
Abstract: In this thesis I investigate the photometric and geometric properties of bright magnetic features in the lower solar atmosphere. The contribution of these fea- tures to Total Solar Irradiance (TSI here after) variations observed at different temporal scales has been broadly showed during the last years. Nevertheless, measurements and theoretical investigations of their properties, on which recon- structions of TSI variations are based, have produced discrepant results. In order to interpret discrepancies presented in the literature and to improve our understanding of physical properties of magnetic elements, both experimen- tal and theoretical aspects have been investigated. In the first part of the thesis I show results obtained by the analysis of full disk PSPT broad band images from Rome and Hawaii. Geometric properties and the possible connection with photometric properties have been investigated through the measurement of fractal dimension of features observed in chrom...
Description: 19. ciclo
URI: http://hdl.handle.net/2108/599
Appears in Collections:Tesi di dottorato in scienze matematiche e fisiche

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