Estelle Salibur
Title : Accretion and feedback of supermassives black holes
Team : COSGAL
Supervisors : Anaëlle Hallé et Françoise Combes
A supermassive black hole (SMBH) appears to reside at the center of every galaxy. Understanding the mechanisms by which these black holes grow and release energy is essential for assessing their impact on the evolution of galaxies. The accretion of gas by these black holes from their surroundings results in feedback processes such as gas outflows and, in some cases, jet phenomena. It is still difficult to understand how gas in a galaxy’s disk loses its angular momentum to get very close to the SMBH. The JWST allows us to study, with unprecedented resolution, the spatial distribution and kinematics of hot molecular gas and dust very close to SMBHs. It also enables us to measure star formation. Combining these observations with ALMA observations of cooler molecular gas has recently begun to give us a complete picture of the physics of gas near SMBHs. We are involved in the Galactic Activity, Torus, and Outflow Survey (GATOS) collaboration, which combines ALMA and JWST observations to study gas accretion, outflows, and star formation near the SMBHs of nearby galaxies.
