Gemini NIFS survey of feeding and feedback processes in nearby active galaxies – II. The sample and surface mass density profiles
| Autor: | Leonard Burtscher, Marlon R. Diniz, M. Crenshaw, Marina Bianchin, N. Z. Dametto, Travis Fischer, Thaisa Storchi-Bergmann, A. J. Schonell, L. G. Dahmer-Hahn, Rogemar A. Riffel, R. A. Riffel, Rebecca L. Davies, David J. Rosario |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Luminous infrared galaxy Active galactic nucleus 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy Velocity dispersion Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Spectral line Redshift Galaxy Luminosity Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Ionization 0103 physical sciences 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 474(1), 1373-1389 Monthly notices of the Royal Astronomical Society, 2018, Vol.474(1), pp.1373-1389 [Peer Reviewed Journal] |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stx2857 |
| Popis: | 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 ($0.2\le \Sigma_{H2} \le 13.9$)$\times10^{-3}$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. Comment: Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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