Title of article :
Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA
Author/Authors :
Ganjali, Javad Department of Physics - Faculty of Science - University of Zanjan, Zanjan , Farhang, Nastaran Department of Physics - Faculty of Science - University of Zanjan, Zanjan , Esmaeili, Shahriar Department of Physics and Astronomy - Texas A&M University - University - College Station, US , Javaherian, Mohsen University of Maragheh, Maragheh , Safari, Hossein Department of Physics - Faculty of Science - University of Zanjan, Zanjan
Abstract :
Solar coronal loops represent vari ety of fast, intermediate, and slow normal
mode oscillations. In this study, the transverse oscillations of a coronal loop observed
on 11 October, 2013 are analyzed using the extreme ultra-violet (EUV) images of the
Sun. Employing the 171 °A solar images recorded by the Solar Dynamic Observatory
(SDO)/Atmospheric Imaging Assembly (AIA), we extracted the oscillation parameters
such as period, damping time, loop length, and the loop width. The period and the
damping of this loop are obtained to be 19 ± 1 and 70 ± 1 minutes, respectively. Also,
the damping quality, the ratio of the damping time to the period, is obtained to be 3.6.
Therefore, we conclude that the damping of the transverse oscillation of this loop is in
the strong damping regime. It is suggested that the resonant absorption would be a
well suitable candidate for the damping mechanism of the studied loop.
Keywords :
Sun , corona Sun , loop Sun , oscillations
Journal title :
Astroparticle Physics
