MUSE-ALMA Halos VI: Coupling Atomic, Ionised & Molecular Gas Kinematics of Galaxies

Abstract

We present results of MUSE-ALMA Halos, an ongoing study of the Circumgalactic Medium (CGM) of galaxies ($z\le$ 1.4). Using multi-phase observations we probe the neutral, ionised and molecular gas in a sub-sample containing six absorbers and nine associated galaxies in the redshift range $z\sim 0.3-0.75$. Here, we give an in-depth analysis of the newly CO-detected galaxy Q2131-G1 ($z=0.42974$), while providing stringent mass and depletion time limits for the non-detected galaxies. Q2131-G1 is associated with an absorber with column densities of $\text{log}(N_{\text{HI}}/{\text{cm}}^{-2})\sim 19.5$ and $\text{log}(N_{{\text{H}}_2}/{\text{cm}}^{-2})\sim 16.5$, has a star formation rate of $\text{SFR}=2.00\pm 0.20{\text{M}}_{\odot }{\text{yr}}^{-1}$, a dark matter fraction of $f_{\text{DM}}(r_{1/2})=0.24-0.54$ and a molecular gas mass of $M_{\text{mol}}=3.52_{-0.31}^{+3.95}\times 10^9{\text{M}}_{\odot }$ resulting in a depletion time of ${\tau }_{\text{dep}}<4.15\text{Gyr}$. Kinematic modelling of both the CO (3--2) and [OIII] $\lambda 5008$ emission lines of Q2131-G1 shows that the molecular and ionised gas phases are well aligned directionally and that the maximum rotation velocities closely match. These two gas phases within the disk are strongly coupled. The metallicity, kinematics and orientation of the atomic and molecular gas traced by a two-component absorption feature is consistent with being part of the extended rotating disk with a well-separated additional component associated with infalling gas. Compared to emission-selected samples, we find that HI-selected galaxies have high molecular gas masses given their low star formation rate. We consequently derive high depletion times for these objects.

18 pages, 9 figures, 3 tables. Accepted for publication in MNRAS

References in corpus (33)

• The Circumgalactic Medium
• Combined CO & Dust Scaling Relations of Depletion Time and Molecular Gas Fractions with Cosmic Time, Specific Star Formation Rate and Stellar Mass
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• Strongly baryon-dominated disk galaxies at the peak of galaxy formation ten billion years ago
• Do Hot Haloes Around Galaxies Contain the Missing Baryons?
• Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database
• Resolving small-scale cold circumgalactic gas in TNG50
• Metal-line absorption around $z\approx$2.4 star-forming galaxies in the Keck Baryonic Structure Survey
• The ALPINE-ALMA [CII] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universe
• Gas filaments of the cosmic web located around active galaxies in a proto-cluster
• Direct Measurement of the Ratio of Carbon Monoxide to Molecular Hydrogen in the Diffuse Interstellar Medium
• IMAGES-III: The evolution of the Near-Infrared Tully-Fisher relation over the last 6 Gyr
• MusE GAs FLOw and Wind (MEGAFLOW) II. A study of gas accretion around $z\approx 1$ star-forming galaxies with background quasars
• Galaxy Counterparts of metal-rich Damped Lyman-alpha Absorbers - I: The case of the z=2.35 DLA towards Q2222-0946
• Predictions for the Angular Dependence of Gas Mass Flow Rate and Metallicity in the Circumgalactic Medium
• The SINFONI MgII Program for Line Emitters (SIMPLE): Discovering starbursts near QSO sight-lines
• Kinematics of Circumgalactic Gas: Feeding Galaxies and Feedback
• The Gas-Star Formation Cycle in Nearby Star-Forming Galaxies I. Assessment of Multi-scale Variations
• Multi-phase Circum-Galactic Medium probed with MUSE and ALMA
• Tracing the Cosmic Metal Evolution in the Low-Redshift Intergalactic Medium
• Nature of the Absorbing Gas associated with a Galaxy Group at z~0.4
• On the Global Mass Distribution in Disk Galaxies
• Observational signatures of a warped disk associated with cold-flow accretion
• Hubble Space Telescope Observations of Sub-Damped Lyman-alpha Absorbers at z < 0.5, and Implications for Galaxy Chemical Evolution
• MUSE-ALMA Halos V: Physical properties and environment of z < 1.4 HI quasar absorbers
• An HST/COS survey of molecular hydrogen in DLAs & sub-DLAs at z < 1: Molecular fraction and excitation temperature
• ALMACAL III: A combined ALMA and MUSE Survey for Neutral, Molecular, and Ionised Gas in an HI-Absorption-Selected System
• The kiloparsec-scale gas kinematics in two star-forming galaxies at $z\sim 1.47$ seen with ALMA and VLT-SINFONI
• ALMA + VLT observations of a Damped Lyman-α absorbing galaxy: Massive, wide CO emission, gas-rich but with very low SFR
• The Kinematics and Dark Matter Fractions of TNG50 Galaxies at z=2 from an Observational Perspective
• High Molecular Gas Masses in Absorption-selected Galaxies at $z\approx 2$
• VALES VII: Molecular and ionized gas properties in pressure balanced interstellar medium of starburst galaxies at z ~ 0.15
• MusE GAs FLOw and Wind (MEGAFLOW) VII. A NOEMA pilot program to probe molecular gas in galaxies with measured circumgalactic gas flows

Cited by in corpus (13)

• MUSE-ALMA Haloes VIII: Statistical Study of Circumgalactic Medium Gas
• MUSE-ALMA Haloes VII: Survey Science Goals & Design, Data Processing and Final Catalogues
• Damped Ly-alpha Absorbers in Star-forming Galaxies at z < 0.15 Detected with the Hubble Space Telescope and Implications for Galaxy Evolution
• Atomic and molecular gas as traced by [C II] emission
• MUSE-ALMA Halos XI: Gas flows in the circumgalactic medium
• The Column Densities of Molecular Gas across Cosmic Time: Bridging Observations and Simulations
• Observations of cold extragalactic gas clouds at $z=0.45$ towards PKS 1610-771
• CO Excitation and Line Energy Distributions in Gas-selected Galaxies
• H_2 molecular gas absorption-selected systems trace CO molecular gas-rich galaxy overdensities
• Searching for cold gas traced by MgII quasar absorbers in massive X-ray-selected galaxy clusters
• ALMACAL X: Constraints on molecular gas in the low-redshift circumgalactic medium
• MUSE-ALMA Haloes XIII. Molecular gas in $z\sim 0.5$ HI-selected galaxies
• ALMA High-Level Data Products: Submillimetre counterparts of SDSS quasars in the ALMA footprint