On the correlation of power in sunspot umbral oscillations with continuum brightness
We analyze time sequences of spectral lines formed at the photospheric level in order to study the correlation of umbral oscillations with continuum brightness and the influence of the fine structure and evolutionary stage of sunspots. The observations were taken using the Gregory-Coude Telescope (GCT) at the Observatorio del Teide (Tenerife)
Aballe Villero, M. A. et al.
Fecha de publicación:
1
1993