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Accueil > Séminaires > Archive des séminaires d’Utinam > 2016

Tatiana Barlyaeva

Variability of the solar corona from 19 years (1996-2014) of LASCO observations - Comparison with solar activity

11 février 2016, 14h00

salle de conférences de l’observatoire

Tatiana Barlyaeva, Laboratoire d’Astrophysique de Marseille

Résumé :

We report on the analysis of the temporal evolution of the solar corona based on 19 years of white-light observations with the LASCO–C2 coronagraph. This evolution is quantified by generating spatially integrated values of the K-corona radiance, first globally, then in latitudinal sectors. The analysis considers time-series of the radiance as well as several indices
and proxies of solar activity, and implement correlation, wavelet time-frequency spectra and cross coherence/phase spectra between these quantities. Our results give a detailed insight on how the corona reacts to solar activity over time scales ranging from mid-term quasi-periodicities to the solar cycle.