DINGO / GAMA / WAVES: HI - halo mass relation

Dev, A ORCID: 0000-0002-1655-8178, Meyer, M, Driver, SP ORCID: 0000-0001-9491-7327, Rhee, J ORCID: 0000-0001-8496-4306, Lambert, TS ORCID: 0000-0001-6263-0970, Nulsen, P, Dodson, R ORCID: 0000-0003-0392-3604, Westmeier, T ORCID: 0000-0002-5300-2486, Whiting, M, Bellstedt, S ORCID: 0000-0003-4169-9738, Robotham, A ORCID: 0000-0003-0429-3579, Liske, J, Tempel, E ORCID: 0000-0002-5249-7018, Baldry, I ORCID: 0000-0003-0719-9385, Loveday, J ORCID: 0000-0001-5290-8940, Davies, L ORCID: 0000-0003-3085-0922, Catinella, B, Brown, MJI ORCID: 0000-0002-1207-9137, Spekkens, K and Holwerda, BW ORCID: 0000-0002-4884-6756 (2026) DINGO / GAMA / WAVES: HI - halo mass relation. Monthly Notices of the Royal Astronomical Society, 549 (1). pp. 1-18. ISSN 0035-8711

Preview

Text DINGO GAMA WAVES HI halo mass relation.pdf - Published Version Available under License Creative Commons Attribution. Download (3MB) | Preview

Abstract

We investigate the relation between neutral atomic hydrogen (H i ) and dark matter halo mass (HIHM) using observations from the Deep Investigation of Neutral Gas Origins (DINGO) pilot survey 100 h data, combined with spectroscopic data from the Galaxy and Mass Assembly (GAMA) survey and photometric data from the Wide Area VISTA Extragalactic Survey (WAVES) photometric catalogue. We employ a combination of direct detections and spectral stacking to probe the H i content of haloes across a wide mass range ( 1010 . 5 ≲ Mh /M ≲ 1014 . 5 ). By incorporating WAVES photometric members on top of the existing GAMA group catalogue, we present a novel approach of extending stacking analyses beyond spectroscopic completeness limits, enabling recovery of satellite H i content otherwise missed. We find that the HIHM relation exhibits a double power-law form, with a turnover near Mh ∼ 1011 . 2 M . Central galaxies dominate the halo H i budget below Mh ∼ 6 ×1012 M , while satellites dominate at higher halo masses. Including photometric members increases the measured H i content in haloes above 1013 M by a factor of 1.5–3, highlighting the importance of gas- rich satellites in the group and cluster regime. Comparison with previous group-stacking studies shows that low-surface brightness galaxies and intra-group H i structures contribute only a minor fraction to the total H i mass in group and cluster haloes, as the summed galaxy H i masses are consistent with the total halo H i content.

Item Type:	Article
Uncontrolled Keywords:	5109 Space Sciences; 51 Physical Sciences; 5109 Space Sciences; 51 Physical Sciences; 0201 Astronomical and Space Sciences; Astronomy & Astrophysics; 5101 Astronomical sciences; 5107 Particle and high energy physics; 5109 Space sciences
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press (OUP)
Date of acceptance:	27 April 2026
Date of first compliant Open Access:	14 May 2026
Date Deposited:	14 May 2026 11:47
Last Modified:	28 May 2026 09:46
DOI or ID number:	10.1093/mnras/stag826
URI:	https://researchonline.ljmu.ac.uk/id/eprint/28577

View Item