Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. V. The Expanded Sample

Résumé fourni par la source

Abstract We present spatially resolved measurements of the ionized gas masses and mass outflow rates for six low-redshift (z ≤ 0.02) active galaxies. In this study, we expand our sample to galaxies with more complex gas kinematics modeled as outflows along a galactic disk that is ionized by the active galactic nucleus (AGN) bicone. We use Hubble Space Telescope Space Telescope Imaging Spectrograph spectroscopy, Wide Field Camera 3 narrow-band imaging, and the photoionization modeling technique that we developed in M. Revalski et al. (Paper IV in this series) to calculate ionized gas masses using the [O iii]/Hβ ratios at each radius. We combine these with existing kinematic models to derive mass and energy outflow rates, which exhibit substantial radial variations due to changes in the outflow velocities. The full sample of 12 galaxies from this series of studies spans 103 in bolometric luminosity, and we find that the outflows contain ionized gas masses of M ≈ 104.6–107.2 M ⊙, reach maximum mass outflow rates of M ̇ o u t ≈ 0.1 − 13 M ⊙ yr−1, and encompass kinetic energies of E ≈ 1052–1056 erg. These energetic properties positively correlate with AGN luminosity. The outflow energetics are less than benchmarks for effective feedback from theoretical models, but the evacuation of gas and injection of energy may still generate long-term effects on star formation in these nearby galaxies. These results highlight the necessity of high spatial resolution imaging and spectroscopy for accurately modeling ionized outflows in active galaxies.

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