An investigation of the circumgalactic medium around z~2.2 AGN with ACA and ALMA

Abstract

While observations of molecular gas at cosmic noon and beyond have focused on the gas within galaxies (i.e., the interstellar medium; ISM), it is also crucial to study the molecular gas reservoirs surrounding each galaxy (i.e., in the circumgalactic medium; CGM). Recent observations of galaxies and quasars hosts at high redshift (z>2) have revealed evidence for cold gaseous halos of scale r_CGM~10kpc, with one discovery of a molecular halo with r_CGM~200kpc and a molecular gas mass one order of magnitude larger than the ISM of the central galaxy. As a follow-up, we present deep ACA and ALMA observations of CO(3-2) from this source and two other quasar host galaxies at z~2.2. While we find evidence for CO emission on scales of r~10kpc, we do not find evidence for molecular gas on scales larger than r>20 kpc. Therefore, our deep data do not confirm the existence of massive molecular halos on scales of ~100 kpc for these X-ray selected quasars. As an interesting by-product of our deep observations, we obtain the tentative detection of a negative continuum signal on scales larger than r>200kpc, which might be tracing the Sunyaev-Zeldovich effect associated with the halo heated by the active galactic nucleus (AGN). If confirmed with deeper data, this could be direct evidence of the preventive AGN feedback process expected by cosmological simulations.

17 pages, 12 figures. Accepted for publication in MNRAS

References in corpus (33)

• The Circumgalactic Medium
• The Evolution of the Star-forming Interstellar Medium across Cosmic Time
• Four phases of angular-momentum buildup in high-z galaxies: from cosmic-web streams through an extended ring to disc and bulge
• The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies
• Tracing the total molecular gas in galaxies: [CII] and the CO-dark gas
• The ALPINE-ALMA [CII] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universe
• Molecular outflows in local galaxies: Method comparison and a role of intermittent AGN driving
• The ALPINE-ALMA [CII] Survey: Size of Individual Star-Forming Galaxies at z=4-6 and their Extended Halo Structure
• The velocity dispersion and mass profile of the Milky Way
• Molecular Gas in the Halo Fuels the Growth of a Massive Cluster Galaxy at High Redshift
• The ALPINE-ALMA [CII] Survey: Obscured Star Formation Rate Density and Main Sequence of star-forming galaxies at z>4
• ALMA observations of massive molecular gas filaments encasing radio bubbles in the Phoenix cluster
• Lyman alpha Emitting Galaxies in the Nearby Universe
• A kiloparsec view of a typical star-forming galaxy when the Universe was ~1 Gyr old. Part I. Outflow, halo, and interstellar medium properties
• Resolving shocks and filaments in galaxy formation simulations: effects on gas properties and star formation in the circumgalactic medium
• An ALMA multi-line survey of the ISM in two quasar host-companion galaxy pairs at $z>6$
• The Atacama Large Aperture Submillimetre Telescope (AtLAST)
• Measurements of the dust properties in z~1-3 SMGs with ALMA
• Tracing Molecular Gas in z $\simeq$ 6 Galaxies with [C$\mathrm{II}$]
• SUPER IV. CO(J=3-2) properties of active galactic nucleus hosts at cosmic noon revealed by ALMA
• Dust continuum, CO, and [C I] 1-0 lines: self-consistent H2 mass estimates and the possibility of globally CO-dark galaxies at $z=0.35$
• SUPER. VI. A giant molecular halo around a z~2 quasar
• ALMA Observations of Quasar Host Galaxies at $z\simeq 4.8$
• Observational Constraints on the Multiphase Nature of Outflows Using Large Spectroscopic Surveys at $z\sim$0
• ALMA reveals large overdensity and strong clustering of galaxies in quasar environments at $z\sim 4$
• Detection of companion galaxies around hot dust-obscured hyper-luminous galaxy W0410-0913
• The Carbon-to-H${}_2$, CO-to-H${}_2$ Conversion Factors and Carbon Abundance on Kiloparsec Scales in Nearby Galaxies
• Evidence of extended cold molecular gas and dust halos around $\mathbf{z}\sim 2.3$ Extremely Red Quasars with ALMA
• Feeding the spider with carbon -- [CII] emission from the circum galactic medium and active galactic nucleus
• Mapping the "invisible" circumgalactic medium around a z $\sim$ 4.5 radio galaxy with MUSE
• Detecting the halo heating from AGN feedback with ALMA
• An ACA Survey of [CI] ${}^3{P}_1{-}^3{P}_0$, CO $J=4-3$, and Dust Continuum in Nearby U/LIRG
• Evidence for extended gaseous reservoirs around AGN at cosmic noon from ALMA CO(3-2) observations

Cited by in corpus (7)

• High resolution modeling of [CII], [CI], [OIII] and CO line emission from the ISM and CGM of a star forming galaxy at z ~ 6.5
• Exploring Spatially-Resolved Metallicities, Dynamics and Outflows in Low-Mass Galaxies at $z\sim 7.6$
• CO survey of high-z radio galaxies, revisited with ALMA: Jet-cloud Alignments and Synchrotron Brightening by Molecular Gas in the Circumgalactic Environment
• A Large Molecular Gas Reservoir in the Protocluster SPT2349$-$56 at $z=4.3$
• CO(1--0) imaging reveals 10-kiloparsec molecular gas reservoirs around star-forming galaxies at high redshift
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Resolving the Hot and Ionized Universe through the Sunyaev-Zeldovich effect
• What halts the growth of galaxies?