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In recent observations by the Hubble Space Telescope (HST) as part of acampaign to discover locations and kinematics of AGN outflows, we found thatMrk 509 contains a 3$''$ ($\sim$2100 {\it pc}) linear filament in its centralregion. Visible in both optical continuum and [OIII] imaging, this featureresembles a `check mark' of several knots of emission that travel northwest tosoutheast before jutting towards the nucleus from the southwest. SpaceTelescope Imaging Spectrograph (STIS/HST) observations along the inner portionof the filament reveal redshifted velocities, indicating that the filament isinflowing. We present further observations of the nucleus in Mrk 509 using theGemini Near-Infrared Integral Field Spectrograph (NIFS), from which we concludethat this structure cannot be related to previously studied, typical NLRoutflows and instead embodies the remains of an ongoing minor merger with agas-rich dwarf galaxy, therefore providing a great opportunity to study thefueling of an AGN by a minor merger in progress.

A Minor Merger Caught In The Act Of Fueling The AGN In Mrk 509