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3 papers · 2 filters
An Active Galactic Nucleus Caught in the Act of Turning Off and On
Julia M. Comerford, R. Scott Barrows, Francisco Müller-Sánchez +5
We present the discovery of an active galactic nucleus (AGN) that is turning off and then on again in the z=0.06 galaxy SDSS J1354+1327. This episodic nuclear activity is the resul…
Shocks and Spatially Offset Active Galactic Nuclei Produce Velocity Offsets in Emission Lines
Julia M. Comerford, R. Scott Barrows, Jenny E. Greene +1
While 2% of active galactic nuclei (AGNs) exhibit narrow emission lines with line-of-sight velocities that are significantly offset from the velocity of the host galaxy's stars, th…
Spatially Offset Active Galactic Nuclei. II: Triggering in Galaxy Mergers
R. Scott Barrows, Julia M. Comerford, Jenny E. Greene +1
Galaxy mergers are likely to play a role in triggering active galactic nuclei (AGN), but the conditions under which this process occurs are poorly understood. In Paper I, we constr…