Conditional HI mass functions and the HI-to-halo mass relation in the local Universe

Abstract

We present a new HI mass estimator which relates the HI-to-stellar mass ratio to four galaxy properties: stellar surface mass density, color index $u-r$, stellar mass and concentration index, with the scatter of individual galaxies around the mean HI mass modeled with a Gaussian distribution. We calibrate the estimator using the xGASS sample, including both HI detection and non-detection, and constrain the model parameters through Bayesian inferences. Tests with mock catalogs demonstrate that our estimator provides unbiased HI masses for optical samples like the SDSS, thus suitable for statistical studies of HI gas contents in galaxies and dark matter halos. We apply our estimator to the SDSS spectroscopic sample to estimate the local HI mass function (HIMF), the conditional HI mass function (CHIMF) in galaxy groups and the HI-halo mass (HIHM) relation. Our HIMF agrees with the ALFALFA measurements at $M_{HI}\gtrsim 5\times 10^9{M}_{\odot }$, but with higher amplitude and a steeper slope at lower masses. We show that this discrepancy is caused primarily by the cosmic variance which is corrected for the SDSS sample but not for the ALFALFA. The CHIMFs for all halo masses can be described by a single Schechter function, and this is true for red, blue and satellite galaxies. For central galaxies the CHIMFs show a double-Gaussian profile, with the two components contributed by the red and blue galaxies, respectively. The total HI mass in a group increases monotonically with halo mass. The HI mass of central galaxies in galaxy groups increases rapidly with halo mass only at $M_h\lesssim 10^{12}{M}_{\odot }$, while the mass dependence becomes much weaker at higher halo masses. The observed HI-halo mass relation is not reproduced by current hydrodynamic simulations and semi-analytic models of galaxy formation.

10 figures, 2 tables, published in ApJ. $\mathbf{Note}$ : The version published in ApJ has a typo. In the last paragraph of section 3.2, the maximum posterior value of c_a should be c_a = 0.10 \pm 0.08, not c_a = 0.16 \pm 0.10

References in corpus (30)

• Array Programming with NumPy
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• Galaxy Groups in the SDSS DR4: II. halo occupation statistics
• Cold gas stripping in satellite galaxies: from pairs to clusters
• The Northern HIPASS catalogue - Data presentation, completeness and reliability measures
• ELUCID - Exploring the Local Universe with reConstructed Initial Density field I: Hamiltonian Markov Chain Monte Carlo Method with Particle Mesh Dynamics
• The Extended Virgo Cluster Catalog
• Galaxy groups in the low-redshift Universe
• LoTSS jellyfish galaxies: II. Ram pressure stripping in groups versus clusters
• The Clustering Characteristics of HI-Selected Galaxies from the 40% ALFALFA Survey
• GASP XVII. HI imaging of the jellyfish galaxy JO206: gas stripping and enhanced star formation
• WALLABY Pilot Survey: the diversity of ram pressure stripping of the galactic HI gas in the Hydra Cluster
• Constraining the HI-Halo Mass Relation From Galaxy Clustering
• The HI Mass Function and Velocity Width Function of Void Galaxies in the Arecibo Legacy Fast ALFA Survey
• Direct Measurement of the HI-Halo Mass Relation through Stacking
• The AMIGA sample of isolated galaxies XIII. The HI content of an almost "nurture free" sample
• First release of Apertif imaging survey data
• The physical drivers of the atomic hydrogen-halo mass relation
• Deep Investigation of Neutral Gas Origins (DINGO): HI stacking experiments with early science data
• WALLABY Pre-Pilot Survey: The effects of tidal interaction on radial distribution of color in galaxies of the Eridanus supergroup
• The SAMI Galaxy Survey: The Low-Redshift Stellar Mass Tully-Fisher Relation
• Unveiling the atomic hydrogen-halo mass relation via spectral stacking
• Pattern recognition in the ALFALFA.70 and Sloan Digital Sky Surveys: A catalog of $\sim$ 500,000 HI gas fraction estimates based on artificial neural networks
• A deep Parkes HI survey of the Sculptor group and filament: HI mass function and environment
• An empirical measurement of the Halo Mass Function from the combination of GAMA DR4, SDSS DR12, and REFLEX II data
• The galaxy HI-(sub)halo connection and the HI spatial clustering of local galaxies
• A study of the HI gas fractions of galaxies at z ~ 1
• The HI and stellar mass bivariate distribution of centrals and satellites for all, late- and early-type local galaxies

Cited by in corpus (9)

• The FAST all sky HI survey (FASHI): The first release of catalog
• Galaxy And Mass Assembly (GAMA): The group HI mass as a function of halo mass
• Galaxy populations in groups and clusters: evidence for a characteristic stellar mass scale at $M_{\ast }\sim 10^{9.5}{M}_{\odot }$
• HI Content of Group Galaxies from the FAST All Sky HI Survey
• Gamma Analytical Modeling Evolution (GAME) I: The physical implications of deriving the stellar mass functions from z=0 to z=8
• The FAST Hundred-Deg${}^2$ HI Deep (HD${}^2$) Survey: Early Results from the Pilot Survey
• Joint Optical-HI mock catalogues and prospects for upcoming HI surveys
• NeutralUniverseMachine: Predictions of HI gas in Different Theoretical Models
• Toward Understanding the Evolutionary Role of Star-forming Lenticular Galaxies: New HI Detections and Comparison with Quiescent S0s and Red Spirals