A Contribution to the Understanding of Chromospheric Oscillations
Vial, J. -C.; Baudin, F.; Bocchialini, K.; Rovira, M.; Lemaire, P.; Costa, A.; Avrett, E. H.; Ibarra, E.
France, Argentina, United States
Abstract
We present SUMER/SOHO UV measurements of chromospheric oscillations of intensity, velocity, and linewidth observed in C I, S I, O I, and C II lines, which are formed in the altitude range from 1000 km to 2000 km above τ500=1. Oscillations in lines originating at similar altitudes exhibit different behaviors which we discuss in terms of the formation of the lines.