Solar chromospheric structures observed in UV ressonance lines : a multivariate analysis approach

TitreSolar chromospheric structures observed in UV ressonance lines : a multivariate analysis approach
Type de publicationJournal Article
Year of Publication1999
AuteursPatsourakos, S., Bocchialini K., and Vial J.-C.
JournalAcademie des Sciences Comptes Rendus Serie Mecanique Physique Chimie Sciences de la Terre et de l Univers
Volume322
Pagination337
Résumé

We present the results of a statistical analysis carried out from a data base of 6 solar chromospheric emission lines recorded simultaneously and with high spectral resolution. An empirical and a clustering method for separating the different solar structures contributions have been used and been found in a good agreement. Mean profiles corresponding to the different populations have been built. Correlations of different parameters for each profile allowed us to deduce different properties of the solar chromosphere, such as the existence of magnetic canopies and downflows in active regions.