IC 630: Piercing the Veil of the Nuclear Gas
arXiv:1703.03894 · doi:10.3847/1538-4357/aa662d
Abstract
IC 630 is a nearby early-type galaxy with a mass of with an intense burst of recent (6 Myr) star formation. It shows strong nebular emission lines, with radio and X-ray emission, which classifies it as an AGN. With VLT-SINFONI and Gemini North-NIFS adaptive optics observations (plus supplementary ANU 2.3m WiFeS optical IFU observations), the excitation diagnostics of the nebular emission species show no sign of standard AGN engine excitation; the stellar velocity dispersion also indicate that a super-massive black hole (if one is present) is small (). The luminosity at all wavelengths is consistent with star formation at a rate of about /yr. We measure gas outflows driven by star formation at a rate of /yr in a face-on truncated cone geometry. We also observe a nuclear cluster or disk and other clusters. Photo-ionization from young, hot stars is the main excitation mechanism for [Fe II] and hydrogen, whereas shocks are responsible for the H excitation. Our observations are broadly comparable with simulations where a Toomre-unstable, self-gravitating gas disk triggers a burst of star formation, peaking after about 30 Myr and possibly cycling with a period of about 200 Myr.
32 pages, 19 figures Accepted for publication in ApJ
References in corpus (25)
- The Host Galaxies and Classification of Active Galactic Nuclei
- A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
- GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
- An ALMA survey of Sub-millimeter Galaxies in the Extended Chandra Deep Field South: Physical properties derived from ultraviolet-to-radio modelling
- A Close Look at Star Formation around Active Galactic Nuclei
- Radiatively Inefficient Accretion in Nearby Galaxies
- Modelling the Pan-Spectral Energy Distribution of Starburst Galaxies: IV The Controlling Parameters of the Starburst SED
- The Wide Field Spectrograph (WiFeS): Performance and Data Reduction
- A 0.8-2.4 microns spectral atlas of Active Galactic Nuclei
- Mapping of the molecular gas inflow towards the Seyfert nucleus of NGC4051 using Gemini NIFS
- Fueling AGN II: Spatially Resolved Molecular Inflows and Outflows
- Feeding versus Feedback in NGC 4151 probed with Gemini NIFS. I. Excitation
- A SINFONI view of Galaxy Centers: Morphology and Kinematics of five Nuclear Star Formation Rings
- ALMA observations of massive molecular gas filaments encasing radio bubbles in the Phoenix cluster
- The effect of stellar feedback on the formation and evolution of gas and dust tori in AGN
- Ionized outflows in luminous type 2 AGNs at z<0.6: no evidence for significant impact on the host galaxies
- Gemini Near Infrared Integral Field Spectroscopy of the Narrow-Line Region of ESO428-G14: kinematics, excitation and the role of the radio jet
- Understanding the two-dimensional ionization structure in luminous infrared galaxies. A near-IR integral field spectroscopy perspective
- Unveiling the origin of the radio emission in radio-quiet quasars
- Feeding Versus Feedback in NGC1068 probed with Gemini NIFS. I. Excitation
- Infrared [Fe II] Emission Lines from Radiative Atomic Shocks
- Nuclear/Circumnuclear Starbursts and Active Galactic Nuclei Mass Accretion in Seyfert Galaxies
- A treatment procedure for VLT/SINFONI data cubes: application to NGC 5643
- Star formation and gas flows in the centre of the NUGA galaxy NGC 1808 observed with SINFONI
- Does the intermediate mass black hole in LEDA 87300 (RGG 118) follow the near-quadratic (M_bh)-(M_spheroid) relation?