A Statistical Analysis of Faint Hα Coronal Emission Associated with Prominences

摘要

The results from a detailed study of the prominences associated with faint Hα emission objects in the solar corona are given. The frequency distribution of the prominences by their lifetime, as well as for the prominence groups with and without `disparition brusque' (DB), is presented. The systematic comparison of the time of the prominence DBs and the observation time of the objects with faint Hα emission, as well as the positions of the faint Hα emissions and the associated filaments at the limb and on the disk of the Sun, suggests that in the most cases these coronal emissions are probably closely connected with the instability processes operating in the prominence magnetic field configurations and leading to prominence final or temporary DBs.