Séminaire : Variability of the solar corona from 19 years (1996-2014) of LASCO observations - Comparison with solar activity
Date:
Thursday, 28 May, 2015 - 11:00
Location:
IAS, bât 121, salle 1-2-3
Speaker(s):
Tatiana Barlyaeva
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.
