WALLABY Pilot Survey: Gas-rich Galaxy Scaling Relations from Marginally Resolved Kinematic Models
Abstract We present the first set of galaxy scaling relations derived from kinematic models of the Widefield Australian Square Kilometer Array Pathfinder (ASKAP) L -band Legacy All-sky Blind surveY (WALLABY) pilot phase observations. Combining the results of the first and second pilot data releases, there are 236 available kinematic models. We develop a framework for robustly measuring H i disk structural properties from these kinematic models, applicable to the full WALLABY survey. Utilizing this framework, we obtained the H i size, a measure of the rotational velocity, and angular momentum for 148 galaxies. These comprise the largest sample of galaxy properties from an untargeted, uniformly observed, and modeled H i survey to date. We study the neutral atomic hydrogen (H i ) size–mass, size–velocity, mass–velocity, and angular momentum–mass scaling relations. We calculate the slope, intercept, and scatter for these scaling relations and find that they are similar to those obtained from other H i surveys. We also obtain stellar masses for 92 of the 148 robustly measured galaxies using multiband photometry through Dark Energy Sky Instrument Legacy Imaging Survey Data Release 10 images. We use a subset of 61 of these galaxies that have consistent optical and kinematic inclinations to examine the stellar and baryonic Tully–Fisher relations as well as the gas fraction–disk stability and gas fraction–baryonic mass relations. These measurements and relations demonstrate the unprecedented resource that WALLABY will represent for resolved galaxy scaling relations in H i .
Authors
- K. Spekkens
- Nathan Deg (ORCID: https://orcid.org/0000-0003-3523-7633)
- T. Westmeier (ORCID: https://orcid.org/0000-0002-5300-2486)
- J. R. Mould (ORCID: https://orcid.org/0000-0003-3820-1740)
- Nikhil Arora (ORCID: https://orcid.org/0000-0002-3929-9316)
- Jonghwan Rhee (ORCID: https://orcid.org/0000-0001-8496-4306)
- Junxian Wang (ORCID: https://orcid.org/0000-0002-4419-6434)
- P. Kamphuis (ORCID: https://orcid.org/0000-0002-5425-6074)
- Karl Glazebrook (ORCID: https://orcid.org/0000-0002-3254-9044)
- L. Cortese (ORCID: https://orcid.org/0000-0002-7422-9823)
- Barbara Catinella (ORCID: https://orcid.org/0000-0002-7625-562X)
- Bi‐Qing For (ORCID: https://orcid.org/0000-0002-0196-5248)
- Lister Staveley‐Smith (ORCID: https://orcid.org/0000-0002-8057-0294)
- A. Bosma (ORCID: https://orcid.org/0000-0002-1128-6089)
- Pavel E. Mancera Piña (ORCID: https://orcid.org/0000-0001-5175-939X)
- R. Halloran
- K. Lee-Waddell (ORCID: https://orcid.org/0000-0003-4844-8659)
- Helga Dénes (ORCID: https://orcid.org/0000-0002-9214-8613)
- Li Shao (ORCID: https://orcid.org/0000-0003-2015-777X)
- O. Ivy Wong (ORCID: https://orcid.org/0000-0003-4264-3509)
- Ahmed Elagali (ORCID: https://orcid.org/0000-0002-8093-4107)
- B. Koribalski (ORCID: https://orcid.org/0000-0003-4351-993X)
- H. M. Courtois (ORCID: https://orcid.org/0000-0003-0509-1776)
- Michael G. Jones (ORCID: https://orcid.org/0000-0002-5434-4904)
Institutions
- Université Claude Bernard Lyon 1 (FR)
- Leiden University (NL)
- Commonwealth Scientific and Industrial Research Organisation (AU)
- Centre National de la Recherche Scientifique (FR)
- Australia Telescope National Facility (AU)
- University of Arizona (US)
- The University of Western Australia (AU)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- Queen's University (CA)
- Curtin University (AU)
- Aix-Marseille Université (FR)
- Universidad Yachay Tech (EC)
- ASTRO-3D (AU)
- ARC Centre of Excellence for Dark Matter Particle Physics (AU)
- Kavli Institute for Theoretical Sciences (CN)
- Astronomy and Space (AU)
- ARC Centre of Excellence for All-sky Astrophysics (AU)
- International Centre for Radio Astronomy Research (AU)
- National Astronomical Observatories (CN)
- Royal Military College of Canada (CA)
- Swinburne University of Technology (AU)
- Western Sydney University (AU)
- Ruhr University Bochum (DE)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2024-11-20
- DOI
- https://doi.org/10.3847/1538-4357/ad84ba
- Citations
- 6
- Primary Topic
- Galaxies: Formation, Evolution, Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.99
Funders
- Science and Industry Endowment Fund
- Australian Government
- Commonwealth Scientific and Industrial Research Organisation
- Bundesministerium für Bildung und Forschung
- Centre National d’Etudes Spatiales
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Government of Western Australia
- Natural Sciences and Engineering Research Council of Canada
- Australian Research Council