Abstract Details


Name: Sankalp Srivastava
Affiliation: Indian Institute of Astrophysics
Conference ID: TVS202510262
Title: The connection between spicules and propagating coronal disturbances from radiative MHD simulations of the solar atmosphere
Authors and Co-Authors: Piyali Chatterjee, Sahel Dey, Robertus Erdélyi
Abstract Type: Contributory Presentation
Abstract: Spicules are ubiquitous, jet-like, small-scale plasma features that populate the lower solar atmosphere, seen most prominently in the chromospheric observations but also exhibiting signatures in the transition region and lower corona. More recently, these highly dynamic spicular jets in observations have been reported to be associated with upward traveling propagating intensity (density) perturbations in the corona. A similar link has been found in simulations. This can have important implications for understanding mass and energy transport in the solar atmosphere. However, the physical origin and properties of these propagating coronal disturbances (PCDs), and their spicular connection, is not yet fully understood. In this ongoing work, we explore the connection of PCDs with spicules by performing 2D and 3D radiative MHD simulations using the Pencil Code where spicules and PCDs are self-consistently produced in the solar atmosphere due to the subsurface convective processes. The shocks passing successively through any point in the atmosphere produce saw-toothed velocity signals. We analyze wavelet power spectra for these velocity signals sampled at multiple atmospheric heights in the simulations along with other diagnostics and use them to investigate how the PCDs are associated with shock waves that drive spicules.