Disc galaxy resolved in HI absorption against the radio lobe of 3C 433: Case study for future surveys

Abstract

The neutral atomic gas content of galaxies is usually studied in the HI 21cm emission line of hydrogen. However, at higher redshifts, we need very deep integrations to detect HI emission. The HI absorption does not suffer from this dependence on distance as long as there is a bright enough background radio source. However, resolved HI absorption studies of galaxies are rare. We report one such rare study of resolved HI absorption against the radio galaxy 3C 433 at $z=0.101$ with the VLA. The resolved kinematics of the absorber, located against the southern lobe of the 3C 433, shows that it has regular kinematics with an HI mass $\lesssim 3.4\times 10^8{M}_{\odot }$ for T${}_{spin}=$ 100K. Our deep optical continuum and H$\alpha$ observations from the Gran Telescopio CANARIAS (GTC) show that the absorber is a faint disc galaxy in the same environment as 3C 433 with a stellar mass $\sim 10^{10}{M}_{\odot }$ and a star-formation rate of 0.15 $M_{\odot }y{r}^{-1}$ or less. For its HI mass, HI column density, stellar mass, and star-formation rate, this galaxy lies well below the main sequence of star-forming galaxies. Its HI mass is lower than the galaxies studied in HI emission at $z\sim 0.1$. Our GTC imaging reveals interesting alignments between H$\alpha$ and radio emission in the HI companion and in the host galaxy of the AGN as well as in the circumgalactic medium in between. This suggests that the shock ionization of gas by the propagating radio source may happen across tens of kpc. Our work supports the potential of studying the HI content in galaxies via absorption in the case of a fortuitous alignment with an extended radio continuum. This allows us to trace galaxies with low HI masses which would otherwise be missed by deep HI emission surveys. In conjunction with the deep all-sky optical surveys, the blind HI surveys with the SKA pathfinders will be able to detect many such systems.

arXiv comment11 pages, 9 figures. Accepted for publication in Astronomy & Astrophysics

References in corpus (66)

• Planck 2013 results. XVI. Cosmological parameters
• The Global Schmidt Law in Star Forming Galaxies
• Detailed Structural Decomposition of Galaxy Images
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• The Baryonic Tully-Fisher Relation
• The Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• The 1000 Brightest HIPASS Galaxies: HI Properties
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release
• Science with ASKAP - the Australian Square Kilometre Array Pathfinder
• The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment
• An Accurate Flux Density Scale from 50 MHz to 50 GHz
• Fast neutral outflows in powerful radio galaxies: a major source of feedback in massive galaxies
• New Lessons from the HI Size-Mass Relation of Galaxies
• Radio Jets Clearing the Way Through a Galaxy: Watching Feedback in Action
• The H-alpha and Infrared Star Formation Rates for the Nearby Field Galaxy Survey
• SDSSJ150634.27+013331.6: the second compact elliptical galaxy in the NGC5846 group
• A universal ultraviolet-optical colour-colour-magnitude relation of galaxies
• The ALFALFA HI mass function: A dichotomy in the low-mass slope and a locally suppressed 'knee' mass
• Spectral ageing in the lobes of FR-II radio galaxies: New methods of analysis for broadband radio data
• The Dearth of Neutral Hydrogen in Galactic Dwarf Spheroidal Galaxies
• Highest Redshift Image of Neutral Hydrogen in Emission: A CHILES Detection of a Starbursting Galaxy at z=0.376
• The spin temperature of high-redshift damped Lyman-$\alpha$ systems
• The GALEX Arecibo SDSS Survey. VI. Second Data Release and Updated Gas Fraction Scaling Relations
• The interstellar and circumnuclear medium of active nuclei traced by HI 21-cm absorption
• WSRT Ultra-Deep Neutral Hydrogen Imaging of Galaxy Clusters at z=0.2, a Pilot Survey of Abell 963 and Abell 2192
• The Arecibo Legacy Fast ALFA Survey: II. Results of Precursor Observations
• HIGHz: A Survey of the Most HI-Massive Galaxies at z~0.2
• GMRT observations of X-shaped radio sources
• Hydrodynamical Backflow in X-shaped Radio Galaxy PKS 2014-55
• A Pilot Survey of HI in Field Galaxies at Redshift z~0.2
• The large scale distribution of warm ionized gas around nearby radio galaxies with jet-cloud interactions
• Discovery of HI gas in a young radio galaxy at $z=0.44$ using the Australian Square Kilometre Array Pathfinder
• The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts
• A search for HI 21cm absorption in strong MgII absorbers in the redshift desert
• NGC 326: X-shaped no more
• Hydrogen 21-Centimeter Emission from a Galaxy at Cosmological Distance
• Atomic hydrogen in star-forming galaxies at intermediate redshifts
• The HI Content of Galaxies in Groups and Clusters as Measured by ALFALFA
• A complete sample of 21-cm absorbers at z~1.3: Giant Metrewave Radio Telescope Survey Using MgII Systems
• CHILES VI: HI and H$\alpha$ Observations for z < 0.1 Galaxies; Probing HI Spin Alignment with Filaments in the Cosmic Web
• 21 cm Absorption Studies with the Square Kilometer Array
• Parsec-scale structures and diffuse bands in a translucent interstellar medium at z 0.079
• Using 21cm Absorption in Small Impact Parameter Galaxy-QSO Pairs to Probe Low-Redshift Damped and Sub-Damped Lyman-alpha System
• GMRT mini-survey to search for 21-cm absorption in Quasar-Galaxy Pairs at z~0.1
• A Giant Metrewave Radio Telescope search for associated HI 21cm absorption in high-redshift flat-spectrum sources
• Galaxy wide radio induced feedback in a radio quiet quasar
• Chandra observations of the hybrid morphology radio sources 3C 433 and 4C 65.15: FR IIs with asymmetric environments
• CHILES: HI morphology and galaxy environment at z=0.12 and z=0.17
• Feedback from low-luminosity radio galaxies: B2 0258+35
• HI 21-cm absorption survey of quasar-galaxy pairs: Distribution of cold gas around z<0.4 galaxies
• HI emission and absorption in nearby, gas-rich galaxies II. -- sample completion and detection of intervening absorption in NGC 5156
• Cold Gas Kinematics in an L* Spiral Galaxy at z=0.437: The Nature of Damped Lyman-alpha Absorbers
• BUDHIES IV: Deep 21-cm neutral Hydrogen, optical and UV imaging data of Abell 963 and Abell 2192 at z $\simeq$ 0.2
• Revealing HI gas in emission and absorption on pc to kpc scales in a galaxy at z ~ 0.017
• Mapping the neutral atomic hydrogen gas outflow in the restarted radio galaxy 3C 236
• HI emission and absorption in nearby, gas-rich galaxies
• Giant Metrewave Radio Telescope detection of associated HI 21cm absorption at $z=1.2230$ towards TXS1954+513
• Mapping kiloparsec-scale structures in the extended HI disc of the galaxy UGC 00439 by HI 21-cm absorption
• Large-scale gas disk around the radio galaxy Coma A
• Origin of X-shaped radio-sources: further insights from the properties of their host galaxies
• Small-scale Properties of Atomic Gas in Extended Disks of Galaxies
• Distribution of Cold ($\lesssim 300$K) Atomic Gas in Galaxies: Results from the GBT HI Absorption Survey Probing the Inner Halos ($\rho <20$kpc) of Low-z Galaxies

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