Ganjali, J., Farhang, N., Esmaeili, S., Javaherian, M., Safari, H. (2018). Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA. Iranian Journal of Astronomy and Astrophysics, 5(2), 75-82. doi: 10.22128/ijaa.2019.328.1047
Javad Ganjali; Nastaran Farhang; Shahriar Esmaeili; Mohsen Javaherian; Hossein Safari. "Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA". Iranian Journal of Astronomy and Astrophysics, 5, 2, 2018, 75-82. doi: 10.22128/ijaa.2019.328.1047
Ganjali, J., Farhang, N., Esmaeili, S., Javaherian, M., Safari, H. (2018). 'Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA', Iranian Journal of Astronomy and Astrophysics, 5(2), pp. 75-82. doi: 10.22128/ijaa.2019.328.1047
Ganjali, J., Farhang, N., Esmaeili, S., Javaherian, M., Safari, H. Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA. Iranian Journal of Astronomy and Astrophysics, 2018; 5(2): 75-82. doi: 10.22128/ijaa.2019.328.1047
Resonant Absorption of a Solar Coronal Loop Observed by SDO/AIA
1Department of Physics, Faculty of Science, University of Zanjan, P.O. Box: 45195-313, Zanjan, Iran
2Department of Physics and Astronomy, Texas A&M University, College Station, TX 77840, US
3Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), University of Maragheh, P.O. Box: 55136-553, Maragheh, Iran
Abstract
Solar coronal loops represent variety 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 AA 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.
Top