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Paper: The Local LIRG NGC 5135: AGN and SN Activity Traced by NIR IFU Spectroscopy
Volume: 446, Galaxy Evolution: Infrared to Millimeter Wavelength Perspective
Page: 83
Authors: Bedregal, A. G.; Colina, L.; Azzollini, R.; Arribas, S.; Alonso-Herrero, A.
Abstract: By observing the local luminous infrared galaxy NGC 5135 with the near-IR IFU spectrograph SINFONI (ESO VLT), we report a ∼ 600 pc (in projection) AGN outflow traced by [SiVI]λ1.96 μm emission. This is the largest outflow traced by a coronal line ever reported. Its large spatial scale suggests that shocks, in addition to AGN continuum emission, are needed to locally produce [SiVI] emission. We also show, for the first time, clear kinematical evidence of the AGN-outflow vs. ISM interaction through variations in the 2D velocity fields of different gas phases. Such local perturbations in the kinematics clearly match the outflow structure. We use the [FeII]λ1.64 μm emission, a supernovae tracer, to estimate the supernovae rate in different star-forming knots (∼ 250 pc across) within the central 2.3 kpc of NGC 5135. The estimated supernovae rates go from 0.02–0.08 yr–1 being in excellent agreement with predictions from 6 cm radio emission in the same areas.
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