Abstract


  ON THE BRIGHT LOOP TOP EMISSION IN POST FLARE LOOPS

  R. Sharma,,, National Centre for Radio Astrophysics, TIFR,
  D. Tripathi , Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Pune 411007, India, durgesh@iucaa.in
  H. Isobe, Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto ,
  A. Ghosh, National Centre for Radio Astrophysics, TIFR, Ganeshkhind, Pune 411007 and Indian Institute for Science Education and Research, Mohanpur - 741 246, West Bengal, India,

The observations of post flares loops in X-rays and EUV reveal strong localised brightenings at the loop top regions. The origin of these brightenings is not explored extensively and therefore the reason for this is not known. We study the dynamics of post flare loops using 1D hydrodynamic modelling with the focus on the localized brightening and perform forward modelling of emission in various spectral lines observed by the Extreme-Ultraviolet Imaging Telescope aboard Hinode. Our findings suggest that these brightenings are the result of collisions between the counter-streaming chromospheric evaporation from both the foot points. The forward modelled intensities are well matched with the observations recorded by EIS for the flare, which occurred in December 2006.