Statistical distribution of HI 21cm intervening absorbers as potential cosmic acceleration probes

Abstract

Damped Lyman-$\alpha$ Absorber (DLA), or HI 21cm Absorber (H21A), is an important probe to model-independently measure the acceleration of spectroscopic velocity ($v_{\mathrm{S}}$) via the Sandage-Loeb (SL) effect. Confined by the shortage of DLAs and Background Radio Sources (BRSs) with adequate information, the detectable amount of DLAs is ambiguous in the bulk of previous work. After differing the acceleration of scale factor ($\ddot{a}$) from the first order time derivative of spectroscopic velocity (${\dot{v}}_{\mathrm{S}}$), we make a statistical investigation of the amount of potential DLAs in the most of this paper. Using Kernel Density Estimation (KDE) to depict general redshift distributions of BRSs, observed DLAs and a DLA detection rate with different limitations (1.4GHz flux, HI column density and spin temperature), we provide fitted multi-Gaussian expressions of the three components and their 1$\sigma$ regions by bootstrap, with a proportional constant of H21As in detected DLAs, leading to the measurable number predictions of H21As for FAST, ASKAP and SKA1-Mid in HI absorption blind survey. In our most optimistic condition ($F_{1.4GHz}$>10mJy, $N_{\mathrm{HI}}>2\times 10^{20}\mathrm{c}{\mathrm{m}}^{-2}$ and $T_{\mathrm{S}}$>500K), the FAST, AKSAP and SKA1-Mid would probe about 80, 500 and 600 H21As respectively.

11 pages(without ref.), 20 figures, 6 tables. MNRAS 521, 3150-3161 (2023). Statistics of potential 21cm DLAs in Sandage-Loeb effect for FAST, ASKAP and SKA1-Mid. Comments welcome!

References in corpus (63)

• The Seventh Data Release of the Sloan Digital Sky Survey
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• Damped Lyman Alpha Systems at z<1.65: The Expanded SDSS HST Sample
• Fundamental Physics with the Square Kilometre Array
• Column density distribution and cosmological mass density of neutral gas: Sloan Digital Sky Survey-III Data Release 9
• On the (Non)Evolution of HI Disks over Cosmic Time
• Considerations for a Multi-beam Multi-purpose Survey with FAST
• Radio and Millimeter Continuum Surveys and their Astrophysical Implications
• Cosmic dynamics in the era of Extremely Large Telescopes
• Gamma-Ray Bursts From Neutron Star Phase Transitions
• Direct Measurement of Cosmological Parameters from the Cosmic Deceleration of Extragalactic Objects
• WALLABY -- An SKA Pathfinder HI Survey
• Barycentric Corrections at 1 cm/s for precise Doppler velocities
• Reconciling the local galaxy population with damped Ly-alpha cross sections and metal abundances
• Cosmological evolution of atomic gas and implications for 21 cm HI absorption
• The 21-SPONGE HI Absorption Line Survey II: The temperature of Galactic HI
• Gaia Early Data Release 3: Acceleration of the solar system from Gaia astrometry
• The spin temperature of high-redshift damped Lyman-$\alpha$ systems
• VLBI measurement of the secular aberration drift
• The HI absorption "Zoo"
• The LBDS Hercules sample of mJy radio sources at 1.4 GHz - II. Redshift distribution, radio luminosity function, and the high-redshift cut-off
• The HI Content of the Universe over the Past 10 Gyrs
• The luminosity-dependent high-redshift turnover in the steep spectrum radio luminosity function: clear evidence for downsizing in the radio-AGN population
• A Combined EIS-NVSS Survey Of Radio Sources (CENSORS) III: Spectroscopic observations
• The Statistical Properties of Neutral Gas at z<1.65 from UV Measurements of Damped Lyman Alpha Systems
• Constraints on the acceleration of the solar system from high-precision timing
• A Machine Learning Based Morphological Classification of 14,245 Radio AGNs Selected From The Best-Heckman Sample
• Statistical properties of damped Lyman-alpha systems from Sloan Digital Sky Survey DR12
• Toward a Direct Measurement of the Cosmic Acceleration
• Radio Galaxy Zoo: The Distortion of Radio Galaxies by Galaxy Clusters
• The CoNFIG Catalogue - II. Comparison of Space Densities in the FR Dichotomy
• Method for Direct Measurement of Cosmic Acceleration by 21-cm Absorption Systems
• Source Counts Spanning Eight Decades of Flux Density at 1.4 GHz
• The First Large Absorption Survey in HI (FLASH): I. Science Goals and Survey Design
• FLASH Early Science -- Discovery of an intervening HI 21-cm absorber from an ASKAP survey of the GAMA 23 field
• Redshift evolution of extragalactic rotation measures
• Blind HI and OH absorption line search: first results with MALS and uGMRT processed using ARTIP
• A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. Physical Properties derived from the SED Fitting with Optical, Infrared, and Radio Data
• A comparative study of intervening and associated HI 21-cm absorption profiles in redshifted galaxies
• HI 21-cm absorption survey of quasar-galaxy pairs: Distribution of cold gas around z<0.4 galaxies
• A prediction for anisotropies in the nearby Hubble flow
• The ACCELERATION programme: I. Cosmology with the redshift drift
• A successful search for intervening 21 cm HI absorption in galaxies at 0.4 < z <1.0 with the Australian Square Kilometre Array Pathfinder (ASKAP)
• The evolution of neutral hydrogen over the past 11 Gyr via HI 21 cm absorption
• Measurement of the solar system acceleration using the Earth scale factor
• Toward a direct measurement of the cosmic acceleration: roadmap and forecast on FAST
• Cosmological impact of redshift drift measurements
• Unprecedented change in the position of four radio sources
• Toward a direct measurement of the cosmic acceleration: the first preparation with FAST
• Blind Search for 21-cm Absorption Systems in New Generation Chinese Radio Telescopes
• The DRaGONS Survey: A Search for High Redshift Radio Galaxies And Heavily Obscured AGNs
• Extragalactic HI 21-cm absorption line observations with the Five-hundred-meter Aperture Spherical radio Telescope
• A statistical measurement of the HI spin temperature in DLAs at cosmological distances
• Forecasting cosmic acceleration measurements using the Lyman-$\alpha$ forest
• Thirty-six New, High-Probability, Damped Ly-alpha Absorbers at Redshift 0.42 < z < 0.70
• A possible connection between the spin temperature of damped Lyman-alpha absorption systems and star formation history
• Direct detection of the cosmic expansion: the redshift drift and the flux drift
• A Measurement of the Cosmic Expansion Within our Lifetime
• Intervening or associated? Machine learning classification of redshifted H I 21-cm absorption
• Cold neutral hydrogen gas in galaxies
• The potential of tracing the star formation history with HI 21-cm in intervening absorption systems
• Real-time Cosmology with High Precision Spectroscopy and Astrometry
• A new model for NVSS galaxy catalogue using the redshift distribution and halo minimum mass

Cited by in corpus (4)

• The FAST HI 21-cm absorption blind survey. II. -- Statistic Exploration for Associated and Intervening systems
• Redshift drift effect through the observation of HI 21cm signal with SKA
• Estimating Cosmological Parameters and Reconstructing Hubble Constant with Artificial Neural Networks: A Test with covariance matrix and mock H(z)
• Dynamical analysis of the redshift drift in FLRW universes