Vaibhav Pant

Name Vaibhav Pant
AffiliationAryabhatta Research Institute of Observational Sciences, Nainital
TitleForward modelling of magnetohydrodynamic waves in the solar atmosphere
AuthorsVaibhav Pant
AbstractSeveral spectroscopic and imaging observations have established the ubiquity of Alfvénic waves in the solar atmosphere. In the past, several studies have suggested that the Alfvenic waves carry energy enough to heat the solar corona. However, an apparent discrepancy was noted in the measured Alfvénic wave energy flux in the solar atmosphere. Some studies have suggested that this discrepancy could be due to the unresolved wave amplitudes along the line-of-sight (LOS) in the solar atmosphere. In this work, I will present the 3D MHD simulations of propagating Alfvénic waves in a gravitationally stratified plasma with properties similar to the open and closed magnetic field regions in the Sun. I will discuss the variation of the Doppler velocities and non-thermal line widths derived from the forward modelling of the Alfvénic waves. I will present the amount of underestimation of true energy in the MHD simulations due to LOS superposition. The LOS superposition of waves makes the emission line profiles asymmetric which can be detected with the future space or ground-based instruments. Finally, I will discuss the relevance of these studies in the context of upcoming solar observatories, especially ADITYA-L1.