Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...12.3.61s&link_type=abstract
"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,
Physics
Scientific paper
High resolution observations of solar filaments/prominences suggest the presence of groups of prominence threads, i.e. the fine-structures of prominences, which oscillate coherently (in phase). Such prominence oscillations are usually attenuated in few periods. In addition, mass flows along threads have been often observed. Here, we investigate the effect of mass flows on the collective fast and slow non-adiabatic magnetoacoustic wave modes supported by systems of cylindrical prominence threads. Configurations of identical and non-identical threads are both explored. We find that the existence of wave modes with a collective appearance, i.e. those that produce significant perturbations in all threads, is only possible for very particular flow velocities. In addition, we assess the efficiency of non-adiabatic effects (radiative losses, thermal conduction and heating) as damping mechanisms.
Ballester Jose Luis
Oliver Ramon
Soler Roberto
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