HALOGAS: Strong Constraints on the Neutral Gas Reservoir and Accretion Rate in Nearby Spiral Galaxies

Abstract

Galaxies in the local Universe are thought to require ongoing replenishment of their gas reservoir in order to maintain the observed star formation rates. Cosmological simulations predict that such accretion can occur in both a dynamically hot and cold mode. However, until now observational evidence of the accretion required to match the observed star formation histories is lacking. This paper attempts to determine whether galaxies in the local Universe possess a significant reservoir of HI and what would be the accretion rates derived from such reservoirs. We search the vicinity of 22 nearby galaxies for isolated HI clouds or distinct streams in a systematic and automated manner. The HALOGAS observations represent one of the most sensitive and detailed HI surveys to date. These observations typically reach column density sensitivities of 10^19 cm^-2 over a 20 km/s width. We find 14 secure HI cloud candidates without an observed optical counterpart. These cloud candidates appear to be analogues to the most massive clouds detected around the Milky Way and M31. However, on average their numbers seem significantly reduced. We constrain upper limits for HI accretion in the local Universe. The average HI mass currently observed amounts to a rate of 0.05 Msun/yr with a stringent upper limit of 0.22 Msun/yr, confirming previous estimates. This is much lower than the average star formation rate in this sample. Our best estimate, based on GBT detection limits of several galaxies, suggests that another 0.04 Msun/yr could be accreted from undetected clouds and streams. These results show that in nearby galaxies HI is not being accreted at the same rate as stars are currently being formed. Our study can not exclude that other forms of gas accretion are at work. However, these observations also do not reveal extended neutral gas reservoirs around most nearby spiral galaxies.

arXiv commentAccepted for publication in Astronomy & Astrophysics section 4. Extragalactic astronomy. Data available at https://www.astron.nl/halogas/data.php

References in corpus (49)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• Multiwavelength study of massive galaxies at z~2. I. Star formation and galaxy growth
• Dust-Corrected Star Formation Rates of Galaxies. I. Combinations of H-alpha and Infrared Tracers
• Cold gas accretion in galaxies
• Updated Nearby Galaxy Catalog
• Gaseous Galaxy Halos
• Moving mesh cosmology: tracing cosmological gas accretion
• The cold gaseous halo of NGC 891
• SoFiA: a flexible source finder for 3D spectral line data
• Accretion of gas onto nearby spiral galaxies
• Deep H I Survey of the Spiral Galaxy NGC 2403
• Color--Mass-to-Light Ratio Relations for Disk Galaxies
• Galaxy And Mass Assembly (GAMA): Mid-Infrared Properties and Empirical Relations from $WISE$
• The EAGLE simulations of galaxy formation: the importance of the hydrodynamics scheme
• Cosmological simulations of the circumgalactic medium with 1 kpc resolution: enhanced HI column densities
• On the Continuing Formation of the Andromeda Galaxy: Detection of HI Clouds in the M31 Halo
• The Westerbork Hydrogen Accretion in Local Galaxies (HALOGAS) Survey I. Survey Description and Pilot Observations
• HI holes and high-velocity clouds in the spiral galaxy NGC 6946
• Converting From 3.6 and 4.5 Micron Fluxes to Stellar Mass
• Distances to Galactic high-velocity clouds. I. Cohen Stream, complex GCP, cloud g1
• HIPASS High-Velocity Clouds: Properties of the Compact and Extended Populations
• The impact of feedback on cosmological gas accretion
• SoFiA 2 -- An automated, parallel HI source finding pipeline for the WALLABY survey
• An Accurate Distance to High-Velocity Cloud Complex C
• DustPedia: Multiwavelength Photometry and Imagery of 875 Nearby Galaxies in 42 Ultraviolet--Microwave Bands
• A confirmed location in the Galactic halo for the high-velocity cloud 'chain A'
• A Catalog of Ultra-compact High Velocity Clouds from the ALFALFA Survey: Local Group Galaxy Candidates?
• Kinematics of Diffuse Ionized Gas Halos: A Ballistic Model of Halo Rotation
• The Galactic Nature of High Velocity Cloud Complex WB
• HALOGAS: Extraplanar gas in NGC 3198
• The origin of the high-velocity cloud complex C
• The Star Formation Rate Distribution Function of the Local Universe
• HALOGAS: the properties of extraplanar HI in disc galaxies
• HALOGAS: HI Observations and Modeling of the Nearby Edge-on Spiral Galaxy NGC 4565
• Gas accretion from minor mergers in local spiral galaxies
• HALOGAS observations of NGC 5023 and UGC 2082: Modeling of non-cylindrically symmetric gas distributions in edge-on galaxies
• The Origin and Distribution of Cold Gas in the Halo of a Milky Way-Mass Galaxy
• Lopsidedness in WHISP galaxies: I. Rotation curves and kinematic lopsidedness
• LCDM Satellites and HI Companions - The Arecibo ALFA Survey of NGC 2903
• CHANG-ES XIX: Galaxy NGC 4013 -- a diffusion-dominated radio halo with plane-parallel disk and vertical halo magnetic fields
• A GBT Survey of the HALOGAS Galaxies and Their Environments I: Revealing the full extent of HI around NGC891, NGC925, NGC4414 & NGC4565
• HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure
• The Evolution of Gas Clouds Falling in the Magnetized Galactic Halo: High Velocity Clouds (HVCs) Originated in the Galactic Fountain
• Detection of the diffuse HI emission in the Circumgalactic Medium of NGC 891 and NGC 4565
• An Introduction to Gas Accretion onto Galaxies
• HI scaling relations of galaxies in the environment of HI-rich and control galaxies observed by the Bluedisk project
• The Robustness of Cosmological Hydrodynamic Simulation Predictions to Changes in Numerics and Cooling Physics
• The detection of a massive chain of dark HI clouds in the GAMA G23 Field
• Cold neutral hydrogen gas in galaxies

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• HI within and around observed and simulated galaxy discs -- Comparing MeerKAT observations with mock data from TNG50 and FIRE-2
• The HI Mass Function of the Local Universe: Combining Measurements from HIPASS, ALFALFA and FASHI
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• The MeerKAT Fornax Survey V. H i kinematics and Fornax cluster membership of the dwarf galaxy ESO 358-60
• Hot accretion onto spiral galaxies: the origin of extended and warped HI discs
• Recent Developments on the HI Gas of Low-Redshift Galaxies Seen by the 21cm Emission Lines