J/ApJS/278/37ivo://CDS.VizieR/J/ApJS/278/37doi:10.26093/cds/vizier/bb-8p-15CDSYu H.Zhu M.Zhang C.-P.Jiang P.Xu J.-L.2026-08-03T07:26:29Z2026-03-24T11:43:32ZCDS support team

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

cds-question@unistra.frgalaxy-groupsgalaxy-clustersh-i-line-emissionradial-velocityastronomical-object-identificationvisible-astronomyUsing the Five-hundred-meter Aperture Spherical radio Telescope, we have performed an Ursa Major supergroup HI survey covering the entire UMa region centered at RA=11:59:28.3,DE=49:05:18 with a radius of 7.5{deg}. We have obtained the most complete catalog of HI sources in the UMa supergroup, containing 178 HI sources with velocities in the range 625-1213.4km/s and masses in the range 10^6.0^-10^10.1^M_{sun}_ assuming a distance of 17.4Mpc. Among them, 55 HI sources were detected for the first time, of which 32 do not have known optical redshifts. For these 32 sources, we have searched the DESI Legacy Surveys and found optical counterparts for 25 of them (with optical images, but no redshifts), with the remaining seven sources being pure HI clouds without an optical counterpart. We detected HI distributions in some interacting systems and discussed four small groups in detail. We computed the neutral hydrogen mass function (HI MF) of the UMa supergroup using the 1/V_max_ method and fitting it with the nonlinear least-squares (NLLS) and modified maximum likelihood (MML) methods. We obtained the following HI MF parameters: log_10_({phi}*/Mpc^-3^)=-0.78+/-0.15, {alpha}=-1.05+/-0.07, and log_10_(M*/M_{sun}_)=9.87+/-0.19 for the NLLS method, and log_10_({phi}*/Mpc^-3^)=-0.70+/-0.11, {alpha}=-1.05+/-0.05, and log_10_(M*/M_{sun}_)=9.77+/-0.13 for the MML method. This result is similar to that derived from the Very Large Array blind survey, but the slope is steeper because we detected more low-mass galaxies. The slope is flatter than that of the global HI MF, which agrees with the theoretical prediction that galaxies in high-density regions are stripped of gas due to interactions.2025ApJS..278...37Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/278/37CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/238 : HYPERLEDA. II. Homogenized HI data (Paturel+, 2003)VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/AJ/112/2471 : The Ursa Major cluster. I. (Tully+ 1996)J/A+A/370/765 : HI synthesis observations in UMa cluster (Verheijen+, 2001)J/AJ/128/16 : HIPASS Bright Galaxy Catalog (Koribalski+, 2004)J/AJ/138/338 : Arecibo Legacy Fast ALFA Survey. IX. (Stierwalt+, 2009)J/MNRAS/428/1790 : HIJASS HI survey in the Ursa Major region (Wolfinger+, 2013)J/MNRAS/445/630 : Early-type galaxies in Ursa Major cluster (Pak+, 2014)J/MNRAS/447/1531 : HI data collection update (Courtois+, 2015)J/A+A/592/A94 : Radio continuum and gas reservoir in NGC 3998 (Frank+, 2016)J/A+A/595/A118 : NIBLES. I. The Nancay HI survey (van Driel+, 2016)J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)J/AJ/157/194 : ALFALFA H I fluxes for extended sources (Hoffman+, 2019)J/MNRAS/494/2090 : Group galaxies in ALFALFA survey (Jones+, 2020)J/A+A/659/A14 : HI observations of the MATLAS dwarfs (Poulain+, 2022)J/AJ/165/263 : Searching in HI for LSB Galaxies (O'Neil+, 2023)J/ApJS/267/27 : SMUDGes V. Complete cat. of UDGs from DR9 (Zaritsky+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/278/37https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/278/37http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/278/37https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/278/37https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/278/37http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/278/37GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/278/37/fumas (FUMaS HI source with (Table 1) and without (Table 2) known-redshift optical counterpart catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/278/37/fumas?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/278/37/fumas?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/278/37/fumas?GETtext/xml+votable180.050000true182.735791750.28552780.0055555555555555565/1373 1375 1407 1493-1495 2731 6/5461 5463 5468-5469 5471 5490 5497 5581 5584 5586-5587 5589-5591 5593-5596 5598-5599 5616-5617 5621 5623 5625 5955-5957 5965-5967 6004 10921 10929-10932 10936 10938 10940 10943 10952 10955 10974-10976 10978-10982 10984-10985 10990-10991 11000 11002-11003 11005-11006 11168-11169 11176-11177 11179-11180https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/278/37?format=asciiOpticalRadiodefaultJ/ApJS/278/37/fumasFUMaS HI source with (Table 1) and without (Table 2) known-redshift optical counterpart catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFUMaFUMaS namemeta.id;meta.mainintf_FUMaFlag(s) on name (1)meta.code;meta.id;meta.maincharRAJ2000[11/12] Hour of Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[42/56] Degree of declination (J2000)pos.eq.dec;meta.maine_Pos[0.7/65.2] Position uncertaintyarcsecstat.error;posfloatHRV[624.9/1213.4] Heliocentric radial velocitykm.s**-1spect.dopplerVeloc.radio;pos.heliocentricfloate_HRV[0.02/1.9] HRV uncertaintykm.s**-1stat.error;spect.dopplerVeloc.radio;pos.heliocentricfloatW50[3.36/583.7] Velocity width at 50% of the peak intensitykm.s**-1phys.veloc;em.line.HIfloate_W50[0.04/3.7] W50 uncertaintykm.s**-1stat.error;phys.veloc;em.line.HIfloatW20[21.9/692.1] Velocity width at 20% of the peak intensitykm.s**-1phys.veloc;em.line.HIfloate_W20[0.06/5.5] W20 uncertaintykm.s**-1stat.error;phys.veloc;em.line.HIfloatFp[0.8/1098] Peak intensitymJyphot.flux.density;em.radio.750-1500MHzfloatSbf[0.015/176.6] Integrated flux density by busy-functionJy.km.s**-1phot.flux.density;em.radio.750-1500MHzfloatSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharONameOptical counterpart namemeta.id.crosscharSsum[0.01/177.1] Integrated flux density by sumJy.km.s**-1phot.flux.density;em.radio.750-1500MHzfloate_Sbf[0.006/0.7] Integrated flux density uncertaintyJy.km.s**-1stat.error;phot.flux.density;em.radio.750-1500MHzfloatrms[0.3/10.4] Root mean square noisemJyinstr.det.noise;stat.meanfloatsnr[4.8/1110] Signal-to-noise ratiostat.snrfloatlogMHI[6/10.1] HI masssolMassphys.mass;em.radio.750-1500MHzfloate_logMHI[5.6/7.7] HI mass uncertaintysolMassstat.error;phys.mass;em.radio.750-1500MHzfloatRAO[11/12]? Hour of optical right ascension (J2000)pos.eq.ra;em.optnullableDEO[42/56]? Degree of optical declination (J2000)pos.eq.dec;em.optnullableOHRV[569/1217]? Optical heliocentric radial velocity (only for Table 1)km/sspect.dopplerVeloc.opt;pos.heliocentricintnullablezOpty: FUMaS HI source with known-redshift optical counterpart (Table 1); n: FUMaS HI source without known-redshift optical counterpart (Table 2)meta.codecharFASHIDisplay data from Zhang+ 2024, J/other/SCPMA/67.19511 within 15"meta.ref.urlchar