Abstract Details
| Name: Aabha Monga Affiliation: Aryabhatta Research Institute of observational sciencES (ARIES), Nainital Conference ID: ASI2017_897 Title : PHOTOSPHERIC ENHANCEMENT AND Hα EVOLUTION OF THE X1.2 CLASS FLARE Authors and Co-Authors : Aabha Monga, ARIES, Nainital; Wahab Uddin, ARIES, Nainital; Ramesh Chandra, DSB Campus, Nainital; Arun K Awasthi, University of Worclaw, Poland. Abstract Type : Oral Abstract Category : Sun and the Solar System Abstract : The major X1.2 class flare occurred in the highly complex active region NOAA AR 11748 on May 15, 2013. Here, we reported evolution of the photospheric Doppler enhancements and the Hα evolution of the flare. Flare showed the two ribbon structure and we seems the stationary brightening propagates during the flare. The jet-like activity before the onset of the flare was the driver of instability. The flare occurred in the lower corona and the coronal loops moved upward which gives the signature of the magnetic reconnection beneath the uprising loops. On the contrary, we found two clusters(kernels) of the velocity enhancements exactly matches the Hα brightening and delayed by 4 minutes. We report on localized enhancement in line-of-sight velocities in the active region related to a flare and the sudden enhancement of this velocity seems to be caused by the Lorentz force driven by the â€magnetic jerkâ€. |