Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: II -The sample and surface mass density profiles

Abstract

We present and characterize a sample of 20 nearby Seyfert galaxies selected for having BAT 14--195keV luminosities $L_X\ge 10^{41.5}$ erg s${}^{-1}$, redshift $z\le$0.015, being accessible for observations with the Gemini Near-Infrared Field Spectrograph (NIFS) and showing extended [OIII]$\lambda$5007 emission. Our goal is to study Active Galactic Nuclei (AGN) feeding and feedback processes from near-infrared integral-field spectra, that include both ionized (HII) and hot molecular (H${}_2$) emission. This sample is complemented by other 9 Seyfert galaxies previously observed with NIFS. We show that the host galaxy properties (absolute magnitudes $M_B$, $M_H$, central stellar velocity dispersion and axial ratio) show a similar distribution to those of the 69 BAT AGN. For the 20 galaxies already observed, we present surface mass density ($\Sigma$) profiles for HII and H${}_2$ in their inner $\sim$500 pc, showing that HII emission presents a steeper radial gradient than H${}_2$. This can be attributed to the different excitation mechanisms: ionization by AGN radiation for HII and heating by X-rays for H${}_2$. The mean surface mass densities are in the range ($0.2\le {\Sigma }_{HII}\le 35.9$)M${}_{\odot }$pc${}^{-2}$, and ($0.2\le {\Sigma }_{H2}\le 13.9$)$\times 10^{-3}$M${}_{\odot }$pc${}^{-2}$, while the ratios between the HII and H${}_2$ masses range between $\sim$200 to 8000. The sample presented here will be used in future papers to map AGN gas excitation and kinematics, providing a census of the mass inflow and outflow rates and power as well as their relation with the AGN luminosity.

Accepted for publication in MNRAS

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Cited by in corpus (6)

• Observational Constraints on the Feeding of Supermassive Black Holes
• Ionized and hot molecular outflows in the inner 500 pc of NGC1275
• Gemini NIFS survey of feeding and feedback in nearbyActive Galaxies - III. Ionized versus warm molecular gasmasses and distributions
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• A Dissection of Spatially Resolved AGN Feedback across the Electromagnetic Spectrum