J/MNRAS/522/5308ivo://CDS.VizieR/J/MNRAS/522/5308CDSPonomareva A.A.Jarvis M.J.Pan H.Maddox N.Jones M.G.Frank B.S.,Rajohnson S.H.A.Mulaudzi W.Meyer M.Adams E.A.K.Baes M.Hess K.M.,Kurapati S.Prandoni I.Sinigaglia F.Spekkens K.Tudorache M.,Heywood I.Collier J.D.Sekhar S.2026-09-04T06:41:26Z2026-09-04T07:32:42ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradio-galaxiesradio-sourcesh-i-line-emissionastrometryphotometryspectroscopyWe present the first measurement of the H I mass function (HIMF) using data from MeerKAT, based on 276 direct detections from the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) Survey Early Science data covering a period of approximately a billion years (0 <= z <= 0.084). This is the first HIMF measured using interferometric data over non-group or cluster field, i.e. a deep blank field. We constrain the parameters of the Schechter function that describes the HIMF with two different methods: 1/V_max_ and modified maximum likelihood (MML). We find a low-mass slope {alpha}=-1.29^+0.37^_-0.26_ , 'knee' mass log_10_ (M_*_ / M_{sun}_) = 10.07^+0.24^_-0.24_ and normalization log_10_ ({phi}_*_ / Mpc^-3^) = -2.34^+0.32^_-0.36_ (H_0_ = 67.4 km/s/Mpc) for 1/V_max_ , and {alpha} = -1.44^+0.13^_-0.10_ , 'knee' mass log_10_ (M_*_ / M_{sun}_) = 10.22^+0.10^_-0.13_ and normalization log_10_ ({phi}_*_ / Mpc^-3^) = -2.52^+0.19^_-0.14_ for MML. When using 1/V_max_ we find both the low-mass slope and 'knee' mass to be consistent within 1{sigma} with previous studies based on single-dish surveys. The cosmological mass density of H I is found to be slightly larger than previously reported: {Omega}_HI_ = 5.46^+0.94^_-0.99_ * 10^-4^ h^-1^_67.4_ from 1/V_max_ and {Omega}_HI_ = 6.31^+0.31^_-0.31_ * 10^-4^ h^-1^_67.4_ from MML but consistent within the uncertainties. We find no evidence for evolution of the HIMF over the last billion years.2023MNRAS.522.5308Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/522/5308CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/508/1195 : The bTFr of MIGHTEE-H I spiral galaxies (Ponomareva+, 2021)J/MNRAS/501/4550 : The complete Arecibo Ultra-Deep Survey (Xi+, 2021)J/MNRAS/498/883 : Neutral hydrogen evolution over the past 11GyrJ/MNRAS/494/2090 : Group galaxies in ALFALFA survey (Jones+, 2020)J/MNRAS/473/1879 : VVDS14h redshift catalog (Rhee+, 2018)J/MNRAS/460/923 : WSRT ZoA Perseus-Pisces. HI catalogue (Ramatsoku+, 2016)J/MNRAS/346/1103 : Redshifts of damped Lyman{alpha} absorbers (Peroux+, 2003)J/A+A/654/A173 : MeerKAT 21-cm HI imaging of Abell 2626 (Healy+, 2021)J/A+A/604/A43 : HI in nearby radio sources (Maccagni+, 2017)J/A+A/564/A125 : AGN Torus model comparison of AGN in the CDFSJ/A+A/547/L1 : SDSS-III DR9 DLA catalogue (Noterdaeme+, 2012)J/ApJ/818/113 : HST observations of QSOs with medium spectraJ/AJ/142/170 : ALFALFA survey: the {alpha}.40 HI source catalogIII/334 : VISTA Deep Extragalactic Observations (VIDEO) (Jarvis+,2013)II/373 : The fourth UltraVISTA data release (DR4) (Moneti+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/522/5308https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/522/5308http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/522/5308https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/522/5308https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/522/5308http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/522/5308GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/522/5308/mightee (MIGHTEE Early science data from COSMOS and XMMLSS in 1310-1420 MHz and spectral resolution of 208985.824635 Hz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/522/5308/mightee?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/522/5308/mightee?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/522/5308/mightee?GETtext/xml+votable180.050000true150.366571942.340383060.0055555555555555565/4422 6814 6/17677 17679 17682-17683 17692 17694 17712 27245 27247 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/522/5308?format=asciiRadiodefaultJ/MNRAS/522/5308/mighteeMIGHTEE Early science data from COSMOS and XMMLSS in 1310-1420 MHz and spectral resolution of 208985.824635 HzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name designation as MGTH_JHHMMSS.s+DDMMSS (name)meta.id;meta.maincharRAJ2000Right ascension (J2000) (ra)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (dec)degpos.eq.dec;meta.mainFreqObserved frequency HI rest frequency is 1.420405 GHz (freq)GHzem.freqdoubleFHIIntegrated total HI flux density (Sdv)Jy.km/sphot.flux.density;em.radio.750-1500MHzdoublee_FHIError on the integrated total HI flux density (err_Sdv)Jy.km/sstat.errordoubleAssocDisplay the ancillary data VizieR catalogsmeta.ref.urlchar