Volume 379, Number 3, December I 2001
|Page(s)||1106 - 1112|
|Section||Planets and planetary systems|
|Published online||15 December 2001|
Wide-spectrum slow magnetoacoustic waves in coronal loops
Physics Department, University of Warwick, Coventry, CV4 7AL, England, UK
Corresponding author: David Tsiklauri, firstname.lastname@example.org
Accepted: 27 September 2001
A model interpreting variations of EUV brightness upward propagating in solar coronal loops as slow magnetoacoustic waves is developed. A loop is considered to have a non-zero plane inclination angle and offset of the circular loop centre from the baseline. The model also incorporates effects of dissipation and gravitational stratification. A linear evolutionary equation is derived and applied to investigations of slow wave dynamics. Both the non-zero plane inclination and the offset decrease the growth of the wave amplitude due to stratification. It is shown that wide-spectrum slow magnetoacoustic waves, consistent with currently available observations in the low frequency part of the spectrum, can provide a rate of heat deposition sufficient to heat the loop. In this scenario, the heat would be deposited near the loop footpoints, which agrees with the current observational data.
Key words: magnetohydrodynamics (MHD) / waves / Sun: activity / Sun: corona / Sun: oscillations / Sun: UV radiation
© ESO, 2001
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.