Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA

Abstract

We present ALMA observations of the CO(1-0) line and 3-mm continuum emission in eight ultraluminous infrared (IR) quasi-stellar objects (QSOs) at z = 0.06-0.19. All eight IR QSO hosts are clearly resolved in their CO molecular gas emission with a median source size of 3.2 kpc, and seven out of eight sources are detected in 3-mm continuum, which is found to be more centrally concentrated with respect to molecular gas with sizes of 0.4-1.0 kpc. Our observations reveal a diversity of CO morphology and kinematics for the IR QSO systems which can be roughly classified into three categories, rotating gas disk with ordered velocity gradient, compact CO peak with disturbed velocity, and multiple CO distinct sources undergoing a merger between luminous QSO and a companion galaxy separated by a few kpc. The molecular gas in three of IR QSO hosts are found to be rotation-dominated with the ratio of the maximum rotation velocity to the local velocity dispersion of $V_{\mathrm{rot}}/\sigma =4-6$. Basic estimates of the dynamical masses within the CO-emitting regions give masses between $7.4\times 10^9$ and $6.9\times 10^{10}$ $M_{\odot }$. We find an increasing trend between BH mass accretion rate and star formation rate (SFR) over three orders of magnitude in far-IR luminosity/SFR, in line with the correlation between QSO bolometric luminosity and SF activity, indicative of a likely direct connection between AGN and SF activity over galaxy evolution timescales.

25 pages, 7 figures, and 4 tables; accepted for publication in ApJ

References in corpus (35)

• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity
• Multiwavelength study of massive galaxies at z~2. II. Widespread Compton thick AGN and the concurrent growth of black holes and bulges
• The SCUBA HAlf Degree Extragalactic Survey (SHADES) - III. Identification of radio and mid-infrared counterparts to submillimetre galaxies
• A Kiloparsec-Scale Hyper-Starburst in a Quasar Host Less than 1 Gigayear after the Big Bang
• Rapidly star-forming galaxies adjacent to quasars at redshifts exceeding 6
• Luminous Infrared Galaxies with the Submillimeter Array: I. Survey Overview and the Central Gas to Dust Ratio
• CO(1-0) in z >/~ 4 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
• Testing the Evolutionary Link Between Submillimetre Galaxies and Quasars: CO Observations of QSOs at z~2
• Star formation rate and dynamical mass of 10^8 solar mass black hole host galaxies at redshift 6
• Interacting galaxies on FIRE-2: The connection between enhanced star formation and interstellar gas content
• Bulge-forming galaxies with an extended rotating disk at z~2
• ALMA Observations Show Major Mergers Among the Host Galaxies of Fast-growing, High-redshift Supermassive Black Holes
• Copious Amounts of Dust and Gas in a z=7.5 Quasar Host Galaxy
• Quasar Feedback in the Ultraluminous Infrared Galaxy F11119+3257: Connecting the Accretion Disk Wind with the Large-Scale Molecular Outflow
• Cold Molecular Gas in Merger Remnants: I. Formation of Molecular Gas Disks
• The compact, ~1 kpc host galaxy of a quasar at z=7.1
• Gas Fraction and Depletion Time of Massive Star Forming Galaxies at z~3.2: No Change in Global Star Formation Process out to z>3
• A wide dispersion in star formation rate and dynamical mass of 10^8 solar mass black hole host galaxies at redshift 6
• Dense Molecular Gas and the Role of Star Formation in the Host Galaxies of Quasi-Stellar Objects
• The WISSH quasars Project: II. Giant star nurseries in hyper-luminous quasars
• The CO Tully-Fisher Relation and Implications for the Host Galaxies of High-Redshift Quasars
• Dust and Gas in Star Forming Galaxies at z~3 - Extending Galaxy Uniformity to 11.5 Billion Years
• The Discovery of Gas-Rich, Dusty Starbursts in Luminous Reddened Quasars at $z\sim 2.5$ with ALMA
• Bulge and Halo Kinematics Across the Hubble Sequence
• 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 --
• Black hole accretion preferentially occurs in gas rich galaxies
• Infrared spectra and photometry of complete samples of PG and 2MASS quasars
• Mid-Infrared Spectroscopic Properties of Ultra-Luminous Infrared Quasars
• ALMA Multi-line Observations of the IR-bright Merger VV 114
• Evidence for feedback in action from the molecular gas content in the z~1.6 outflowing QSO XID2028
• ALMA Observations of Warm Molecular Gas and Cold Dust in NGC 34
• Testing the Evolutionary Link between Type 1 and Type 2 Quasars with Measurements of the Interstellar Medium
• AGN torus detectability at sub-millimeter wavelengths: What to expect from ALMA continuum data
• Gas reservoir of a hyper-luminous QSO at z=2.6
• ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179${}^{\star }$

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