ALMA Observations of Multiple-CO and C Lines Toward the Active Galactic Nucleus of NGC 7469: X-Ray-dominated Region Caught in the Act

Abstract

We used the Atacama Large Millimeter/submillimeter Array (ALMA) to map ${}^{12}$CO($J$ = 1-0), ${}^{12}$CO($J$ = 2-1), ${}^{12}$CO($J$ = 3-2), ${}^{13}$CO($J$ = 2-1), and [CI](${}^3{P}_1$-${}^3{P}_0$) emission lines around the type 1 active galactic nucleus (AGN) of NGC 7469 ($z=0.0164$) at $\sim 100$ pc resolutions. The CO lines are bright both in the circumnuclear disk (central $\sim 300$ pc) and the surrounding starburst (SB) ring ($\sim 1$ kpc diameter), with two bright peaks on either side of the AGN. By contrast, the [CI](${}^3{P}_1$-${}^3{P}_0$) line is strongly peaked on the AGN. Consequently, the brightness temperature ratio of [CI](${}^3{P}_1$-${}^3{P}_0$) to ${}^{13}$CO(2-1) is $\sim 20$ at the AGN, as compared to $\sim 2$ in the SB ring. Our local thermodynamic equilibrium (LTE) and non-LTE models indicate that the enhanced line ratios (or CI enhancement) are due to an elevated C${}^0$/CO abundance ratio ($\sim 3-10$) and temperature ($\sim 100-500$ K) around the AGN as compared to the SB ring (abundance ratio $\sim 1$, temperature $\lesssim 100$ K), which accords with the picture of the X-ray-dominated Region (XDR). Based on dynamical modelings, we also provide CO(1-0)-to- and [CI](${}^3{P}_1$-${}^3{P}_0$)-to-molecular mass conversion factors at the central $\sim 100$ pc of this AGN as ${\alpha }_{\mathrm{CO}}=4.1$ and ${\alpha }_{\mathrm{CI}}=4.4M_{\odot }$ (K km s${}^{-1}$ pc${}^2$)${}^{-1}$, respectively. Our results suggest that the CI enhancement is potentially a good marker of AGNs that could be used in a new submillimeter diagnostic method toward dusty environments.

25 pages, 12 figures, 8 tables. Accepted for publication in ApJ. Minor updates in a replacement

References in corpus (32)

• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Molecular line emission in NGC1068 imaged with ALMA. I An AGN-driven outflow in the dense molecular gas
• A Close Look at Star Formation around Active Galactic Nuclei
• Diagnostics of irradiated dense gas in galaxy nuclei. II. A grid of XDR and PDR models
• Obscuration-dependent evolution of Active Galactic Nuclei
• A multi-transition HCN and HCO+ study of 12 nearby active galaxies: AGN versus SB environments
• Improved Dynamical Constraints on the Masses of the Central Black Holes in Nearby Low-mass Early-type Galactic Nuclei And the First Black Hole Determination for NGC 205
• Molecular line emission in NGC1068 imaged with ALMA: II. The chemistry of the dense molecular gas
• ALMA observations of atomic carbon in z~4 dusty star-forming galaxies
• Millimeter Interferometric HCN(1-0) and HCO+(1-0) Observations of Luminous Infrared Galaxies
• Reverberation Mapping of the Seyfert 1 Galaxy NGC 7469
• Modelling [CI] emission from turbulent molecular clouds
• On carbon and oxygen isotope ratios in starburst galaxies: New data from NGC253 and Mrk231 and their implications
• The properties of the interstellar medium of galaxies across time as traced by the neutral atomic carbon [CI]
• Neutral carbon and CO in 76 (U)LIRGs and starburst galaxy centers A method to determine molecular gas properties in luminous galaxies
• A Hard X-ray Test of HCN Enhancements as a Tracer of Embedded Black Hole Growth
• The mass-energy budget of the ionised outflow in NGC 7469
• ALMA HCN and HCO+ J=3-2 observations of optical Seyfert and luminous infrared galaxies -- Confirmation of elevated HCN-to-HCO+ flux ratios in AGNs --
• The hidden heart of the luminous infrared galaxy IC 860 I. A molecular inflow feeding opaque, extreme nuclear activity
• Nuclear Bar Catalyzed Star Formation: 13^CO, C18^O and Molecular Gas Properties in the Nucleus of Maffei 2
• Diagnostics of the molecular component of PDRs with mechanical heating. II: line intensities and ratios
• Planck's Dusty GEMS. VII. Atomic carbon and molecular gas in dusty starburst galaxies at z=2 to 4
• A figure of merit for black hole mass measurements with molecular gas
• Circumnuclear Multi-phase Gas in Circinus Galaxy I: Non-LTE calculations of CO lines
• Direct measurement of the [CI] luminosity to molecular gas mass conversion factor in high-redshift star-forming galaxies
• Spatially resolved carbon and oxygen isotopic ratios in NGC 253 using optically thin tracers
• A Chandra and ALMA Study of X-ray-irradiated Gas in the Central ~100 pc of the Circinus Galaxy
• [CI](1-0) and [CI](2-1) in resolved local galaxies
• ALMA Observations of Atomic Carbon [C I] (${{}^3\mathrm{P}}_1\to {{}^3\mathrm{P}}_0$) and Low-$J$ CO Lines in the Starburst Galaxy NGC 1808
• NGC 7469 as seen by MEGARA: new results from high-resolution IFU spectroscopy
• AGN X-ray irradiation of CO gas in NGC 2110 revealed by $Chandra$ and ALMA
• Optical detection of the radio supernova SN 2000ft in the circumnuclear region of the luminous infrared galaxy NGC 7469

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