Hot prominence detected in the core of a Coronal Mass Ejection: III. Plasma filling factor from UVCS Lyman-$\alpha$ and Lyman-$\beta$ observations

R. Susino, A. Bemporad, S. Jejčič +1

This work deals with the study of an erupting prominence embedded in the core of a CME and focuses on the derivation of the prominence plasma filling factor. We explore two methods…