The source of the solar oscillations: Convective or magnetic?
Osservatorio Astronomico di Capodimonte, Via Moiarello 16, 80131 Napoli, Italy
2 Department of Physics University of Rome, P.le A. Moro 2, 00185 Rome, Italy
3 Institute of Geophysics, Astrophysics and Meteorology of the University of Graz, Universitaetsplatz 5, 8010 Graz, Austria
4 Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, 34131 Trieste, Italy
5 Kanzelhhe Solar Observatory, 9521 Treffen, Austria
Corresponding author: P. F. Moretti, firstname.lastname@example.org
Accepted: 10 April 2001
The origin of solar oscillations has not yet been clearly determined. The downflows due to convective rapid cooling at the surface have been invoked as 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 spatial and temporal characteristics of other observed events and their correlation with the Hα bright points suggests downward plasma jets related to explosive chromospheric evaporation to be another possible candidate.
Key words: sun: oscillations / flares / chromosphere
© ESO, 2001