The source of the solar oscillations: Convective or magnetic?

The origin of solar oscillations has not yet been clearly determined. The d ownflows due to convective rapid cooling at the surface have been invoked a s a possible source. In this paper we investigate the properties of the source as inferred from the local analysis of the intensity-velocity phase differences. The same sp atial and temporal characteristics of other observed events and their corre lation with the H alpha bright points suggests downward plasma jets related to explosive chromospheric evaporation to be another possible candidate.