Speaker
Xiurui Zhao
(Caltech)
Description
The X-ray emission in active galactic nuclei (AGN) is produced in a hot corona, where energetic electrons up-scatter UV/optical photons from the accretion disk into X-rays through inverse Compton scattering. Hard X-ray observations from NuSTAR provide key constraints on the coronal temperature and optical depth, while recent studies have revealed that millimeter (mm) synchrotron emission offers a powerful new probe of the corona’s size, magnetization, and particle distribution. We will present new constraints from NuSTAR and multi-band ALMA observations, showing how the synergy between mm and hard X-ray measurements is enabling a more complete and self-consistent picture of AGN coronae.
Author
Xiurui Zhao
(Caltech)