Connections between heating processes in the chromosphere, transition region and low corona

Abstract:

We exploit the high spatio-temporal and spectral resolution of observations with the Interface Region Imaging Spectrograph (IRIS) and the Swedish Solar Telescope to investigate how chromospheric, transition region and coronal heating are connected, in particular in plage regions at the footpoints of hot coronal loops. We investigate the spatio-temporal properties of low chromospheric heating, as diagnosed with the Mg II h and k lines, and study their connection with moss emission, often used as a proxy for coronal heating. In addition, we show how chromospheric dynamic events such as jets impact the transition region and low corona.