Speaker
Description
Studying gas kinematics in the circumnuclear regions of a galaxy provides crucial insights into how gas is transported toward the supermassive black hole, fueling an active galactic nucleus (AGN), which itself can trigger feedback. We present NOEMA CO(2-1) observations of the nearby Compton-thick AGN NGC 3079, with an angular resolution of 0.5′′ (~40 pc). On larger scales, both the position-velocity (P-V) diagram and channel maps show that there are two distinct rotating structures with a 20-degree difference in position angle. After subtracting the rotating disk model generated by 3DBarolo and DysmalPy, we identify non-circular motions in the southern redshifted regions. In the central region, we also detect an unresolved high-velocity dispersion residual that cannot be explained by the larger-scale rotating disk. We will discuss the possibility of a nuclear outflow, which may explain the broad component observed in the gas kinematics.
