Abstract: As a galaxy's central supermassive black hole accretes interstellar gas and grows in mass, it releases large amounts of radiation (as an active galactic nucleus, or AGN) that can influence the evolution of the galaxy. However, it is not clear exactly what role these AGN play in galaxy evolution, or the mechanism by which this influence acts. Studying the gas ionized by AGN radiation allows insight into the interplay between the AGN and their host galaxies. In particular, the extended emission-line region contains information about the kinematics of ionized gas, contributing to a fuller picture of AGN influence on the host galaxy.

 

We analyze the optical narrow-line region of UGC 03157, also known as SWIFT J0446.4+1828, a nearby (z ~ 0.015) galaxy that hosts a bright AGN. This object was part of a sample of low-luminosity Swift/BAT sources selected for kinematic analysis. In addition to gas kinematics, we analyze the source’s IR spectral energy distribution, which appears to be dominated by star forming activity.