Wide-spectrum slow magnetoacoustic waves in coronal loops
Tsiklauri, D and Nakariakov, VM 2001, 'Wide-spectrum slow magnetoacoustic waves in coronal loops' , Astronomy and Astrophysics, 379 (3) , pp. 1106-1112.
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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.
|Uncontrolled Keywords:||Magnetohydrodynamics MHD waves, sun: activity, sun: corona, sun: oscillations, sun: UV radiation|
|Themes:||Subjects / Themes > Q Science > QB Astronomy
Subjects outside of the University Themes
|Schools:||Schools > School of Computing, Science and Engineering|
|Journal or Publication Title:||Astronomy and Astrophysics|
|Depositing User:||H Kenna|
|Date Deposited:||03 Sep 2007 14:48|
|Last Modified:||01 Dec 2015 00:03|
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