Deep 21-cm HI Observations at z~0.1: The Precursor to the Arecibo Ultra Deep Survey

Abstract

The "ALFA Ultra Deep Survey" (AUDS) is an ongoing 21-cm spectral survey with the Arecibo 305m telescope. AUDS will be the most sensitive blind survey undertaken with Arecibo's 300 MHz Mock spectrometer. The survey searches for 21-cm HI line emission at redshifts between 0 and 0.16. The main goals of the survey are to investigate the HI content and probe the evolution of HI gas within that redshift region. In this paper, we report on a set of precursor observations with a total integration time of 53 hours. The survey detected a total of eighteen 21-cm emission lines at redshifts between 0.07 and 0.15 in a region centered around ra~0:00h, dec= 15:42deg. The rate of detection is consistent with the one expected from the local HI mass function. The derived relative HI density at the median redshift of the survey is rho_HI[z=0.125]=(1.0+/-0.3)*rho_0, where rho_0 is the HI density at zero redshift.

accepted for publication in Astrophysical Journal

References in corpus (12)

• Cold gas accretion in galaxies
• Vigorous star formation with low efficiency in massive disk galaxies at z=1.5
• The Northern HIPASS catalogue - Data presentation, completeness and reliability measures
• The HI content of star-forming galaxies at z = 0.24
• The Arecibo Legacy Fast ALFA Survey: III. HI Source Catalog of the Northern Virgo Cluster Region
• The Cosmic Decline in the H2/HI-Ratio in Galaxies
• WSRT Ultra-Deep Neutral Hydrogen Imaging of Galaxy Clusters at z=0.2, a Pilot Survey of Abell 963 and Abell 2192
• The Arecibo Galaxy Environment Survey: Precursor Observations of the NGC 628 group
• A Pilot Survey of HI in Field Galaxies at Redshift z~0.2
• The Arecibo L-band Feed Array Zone of Avoidance Survey I: Precursor Observations through the Inner and Outer Galaxy
• The Effelsberg-Bonn HI Survey (EBHIS)
• The WSRT virgo filament survey

Cited by in corpus (36)

• WATCHDOG: A Comprehensive All-Sky Database of Galactic Black Hole X-ray Binaries
• WALLABY -- An SKA Pathfinder HI Survey
• The Neutral Hydrogen Cosmological Mass Density at z=5
• Detection of HI in distant galaxies using spectral stacking
• Atomic and molecular gas in IllustrisTNG galaxies at low redshift
• Neutral atomic hydrogen (HI) gas evolution in field galaxies at z ~ 0.1 and 0.2
• Which galaxies dominate the neutral gas content of the Universe?
• Neutral hydrogen (HI) gas content of galaxies at $z\approx 0.32$
• Discovery of a Perseus-like cloud in the early Universe: HI-to-H2 transition, carbon monoxide and small dust grains at zabs=2.53 towards the quasar J0000+0048
• A search for HI absorption in nearby radio galaxies using HIPASS
• The Clustering Characteristics of HI-Selected Galaxies from the 40% ALFALFA Survey
• Discovery of HI gas in a young radio galaxy at $z=0.44$ using the Australian Square Kilometre Array Pathfinder
• A Pilot for a VLA HI Deep Field
• Theoretical and observational constraints on the HI intensity power spectrum
• Extragalactic HI Surveys
• GMRT observation of neutral atomic hydrogen gas in the COSMOS field at $z\sim 0.37$
• Forecast for FAST: from Galaxies Survey to Intensity Mapping
• An accurate low-redshift measurement of the cosmic neutral hydrogen density
• From star-forming galaxies to AGN: the global HI content from a stacking experiment
• Modelling the cosmic neutral hydrogen from DLAs and 21 cm observations
• Deep Investigation of Neutral Gas Origins (DINGO): HI stacking experiments with early science data
• The Arecibo Ultra-Deep Survey
• Redshift evolution of stellar mass versus gas fraction relation in 0<z<2 regime: observational constraint for galaxy formation models
• Probing large scale filaments with HI and ${}^3$HeII
• The local PNG bias of neutral Hydrogen, ${\mathrm{H}}_{\mathrm{I}}$
• The HI mass function as a probe of photoionisation feedback on low mass galaxy formation
• An ASKAP survey for HI absorption towards dust-obscured quasars
• The ALFA ZOA Deep Survey: First Results
• The most distant HI galaxies discovered by the 500 m dish FAST
• The cosmic atomic hydrogen mass density as a function of mass and galaxy hierarchy from spectral stacking
• Observational Evidence For Constant Gas Accretion Rate Since z = 5
• Cosmology from HI galaxy surveys with the SKA
• A consistent model for both the HI and stellar mass functions of galaxies
• Interferometric Cubelet Stacking to Recover H\,\textsc{i} Emission from Distant Galaxies
• FAST Ultra-Deep Survey (FUDS): Data Release for FUDS0
• Measuring Cosmic Density of Neutral Hydrogen via Stacking the DINGO-VLA Data