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Neutral Atomic Hydrogen Surveys: past, present and future

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arxiv 2407.03166 v2 pith:CFUKXOZE submitted 2024-07-03 astro-ph.GA

Neutral Atomic Hydrogen Surveys: past, present and future

F. M. Maccagni , W. J. G. de Blok This is my paper
classification astro-ph.GA
keywords galaxiessurveysatomicfuturehydrogenneutralpastresolution
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Neutral atomic hydrogen (HI) observations are fundamental to understand the dynamics of galaxies, their assembly, the fuelling of their star formation and environmental interactions. HI studies have so far been limited by the capabilities of single-dish radio telescopes or synthesis arrays to either small samples or low resolution and sensitivities. Now, the Square Kilometer Array precursors and pathfinders are providing a novel view of the HI in and around galaxies allowing wide-field high resolution deep surveys in nearby galaxies. We give an overview of past, current and future HI surveys consistently comparing their HI column density and spatial resolutions highlighting their main scientific key goals and results.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The ultra-deep HI radial profiles of late-type galaxies from MHONGOOSE

    astro-ph.GA 2026-06 unverdicted novelty 5.0

    Ultra-deep HI radial profiles of 16 galaxies show inner plateaus or steep declines without clear edges and become self-similar when scaled to the radius at 0.01 M_sun pc^-2 surface density.

  2. The Bright Future of the Dark and Dim Universe

    astro-ph.GA 2026-06 accept novelty 4.0

    SKA-Mid AA4 will resolve nearby RELHIC gas structure and measure the HIMF, HIVF and bTFR to 10^6 solar masses, testing ΛCDM and baryonic suppression.

  3. From Atomic Gas to Star Formation

    astro-ph.GA 2026-07 accept novelty 3.5

    SKA-Mid AA4 will enable wide-area, high-resolution atomic-gas surveys of hundreds of galaxies to Virgo, revealing how cold HI condenses into molecular gas and fuels star formation.

  4. AGN Feeding & Feedback Over the Galactic Scales

    astro-ph.GA 2026-06 unverdicted novelty 2.0

    SKAO will trace synchrotron jets, thermal emission, and low-column-density HI gas in nearby AGN to characterize duty cycles and multi-phase feeding/feedback linked to star formation.

  5. Deep HI observations of cold gas inflow and outflow

    astro-ph.GA 2026-06 unverdicted novelty 2.0

    Review chapter on HI observations of gas inflow/outflow in disk and dwarf galaxies and prospects for SKA-Mid AA4 to address missing data on low-column-density gas.

  6. The Bright Future of the Dark and Dim Universe

    astro-ph.GA 2026-06 unverdicted novelty 2.0

    Review chapter on SKA observations of RELHICs and dim galaxies to constrain LambdaCDM and baryonic physics via HIMF, HIVF, and bTFR down to 10^6 solar masses.