Volume 395, Number 1, November III 2002
|Page(s)||293 - 296|
|Section||Planets and planetary systems|
|Published online||29 October 2002|
An interpretation of the phase background based on observed plasma jets
I.N.A.F., 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 I.N.A.F., 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: 4 September 2002
The presence of a solar background in the phase difference between the intensity and velocity () p-mode oscillation signals recently has been interpreted in terms of downflows due to convection (Skartlien & Rast [CITE]) or due to chromospheric explosive events (Moretti et al. [CITE]a). In support of the latter, we present I and V characteristics of impulsive brightenings observed in the NaI D lines, show that these reproduce the frequency dependence of the modulation background, and show that explanations invoking more frequently occurring phenomena such as seismic events are not likely in low-l modulation data.
Key words: Sun: oscillations / Sun: flares
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.