Abstract Details


Name: S. Krishna Prasad
Affiliation: ARIES, Nainital
Conference ID: TVS202510016
Title: Height-dependent energy flux of slow waves in the lower solar atmosphere
Authors and Co-Authors: Y. Sanjay
Abstract Type: Invited by SOC
Abstract: The acoustic oscillations on the solar surface decay rapidly as they propagate into the atmosphere due to radiative damping and shock dissipation. In the strongly magnetised locations like sunspots, they undergo mode conversion into the fast and slow magnetoacoustic waves and continue to propagate into the solar corona. In order to properly assess their contribution to heating in the lower solar atmosphere, we study height-dependent variation in the energy flux of slow waves across 20 different active regions. Our results indicate a gradual increase in the wave amplitude, peaking between 700 and 900 km, followed by a steady decrease. Further, at altitudes greater than 1800 km, there appears to be a secondary increase and decrease in the wave amplitude. The corresponding energy flux shows a monotonous decrease with a significant reduction in value.