Probing the close environment of SMBHs with the FeKa Compton Shoulder

The reprocessed X-ray radiation carries a lot of information related to the properties of the circumnuclear material. We use the ray-tracing code RefleX (Paltani & Ricci 2017) to explore how the physical properties of the SMBH’s environment affect the shape of the Compton Shoulder (CS), the low energy tail formed behind the FeKa line. Using a torus model, we perform a series of simulations testing the column density (NH), metallicity (Z) and dust presence. Next, we create different AGN models and illustrate the change of the CS shape. Last, we simulate spectra for the Circinus galaxy using XRISM response files to show that the CS can be used to trace the properties of the circumnuclear material.