J/MNRAS/528/542ivo://CDS.VizieR/J/MNRAS/528/542CDSKurapati S.Kraan-korteweg R.C.Pisano D.J.Chen H.Rajohnson S.H.A.,Steyn N.Frank B.Serra P.Goedhart S.Camilo F.2026-07-28T13:47:07Z2026-07-28T14:45:45ZCDS support team

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

cds-question@unistra.frgalaxiescatalogssurveysh-i-line-emissionradial-velocityredshiftedastrometrymilky-way-galaxyThe Local Void is one of the nearest large voids, located at a distance of 23Mpc. It lies largely behind the Galactic Bulge and is therefore extremely difficult to observe. We use HI 21cm emission observations from the SARAO MeerKAT Galactic Plane Survey (SMGPS) to study the Local Void and its surroundings over the Galactic longitude range 329deg<l<55deg, Galactic latitude |b|<1.5deg, and redshift cz<7500km/s. We have detected 291 galaxies of median rms sensitivity 0.44 mJy per beam per 44 km/s channel. We find 17 galaxies deep inside the Void, 96 at the border of the Void, while the remaining 178 galaxies are in average density environments. The extent of the Void is ~58Mpc. It is severely underdense for the longitude range 350deg<l<35deg up to redshift z<4500km/s. The galaxies in the Void tend to have HI masses that are lower (by approximately 0.25dex) than their average density counterparts. We find several potential candidates for small groups of galaxies, of which two groups (with 3 members and 5 members) in the Void show signs of filamentary substructure within the Void.2024MNRAS.528..542Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/528/542CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/528/542https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/528/542http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/528/542https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/528/542https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/528/542http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/528/542GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/528/542/table1 (LV-SMGPS HI galaxy catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/528/542/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/528/542/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/528/542/table1?GETtext/xml+votable180.050000true238.1469-52.37450.005555555555555556Cone search capability for table J/MNRAS/528/542/table3 (HI parameters of galaxies in groups)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/528/542/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/528/542/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/528/542/table3?GETtext/xml+votable180.050000true240.3387-53.43150.0055555555555555565/7648 7673 7678 10542 10598-10599 10624 6/12970 14336 28807 28810 28875 28878-28879 28897 28899-28900 28902-28903 28915 28917 28921 29088 29505 29507 29510 29517 29526 29530 29532 29534 30223 30246 30256-30257 30259-30260 30263 30268 30306 30318 30330-30331 30400-30401 30404 30416-30417 30421 30598 30600 30602-30604 30616 30618-30620 30622 30640 30645-30647 30666-30667 30688 30690-30691 30696 30701 30703-30704 30706 30718-30719 32084-32085 42155 42157-42159 42166 42173-42174 42206-42207 42209-42211 42214-42218 42220-42221 42224 42226-42230 42377-42382 42386-42387 42389-42390 42432 42434-42435 42437 42439 42441-42442 42444-42445 42447 42454 42458 42461 42500-42501 42512-42513 425161.1343831186515773e-24 1.1343831186515773e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/528/542?format=asciiRadiodefaultJ/MNRAS/528/542/table1LV-SMGPS HI galaxy cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIparamindicates HI parameters in table 3meta.ref.urlcharNameName of the galaxy, the format (SMGPS- HI)JHHMMSS-DDMMSS represents the rounded values of RA and Declinationmeta.id;meta.maincharprimaryMosaicMosaic (Txx or Nxx from Figure 1 in paper) in which the galaxy is detectedobs.fieldcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.lat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedFintIntegrated flux in L-band (856-1712MHz)Jy.km/sphot.flux.density;em.radio.750-1500MHzfloate_FintError on integrated fluxJy.km/sstat.errorfloatFpeakPeak flux in L-band (856-1712MHz)Jyphot.flux.density;em.radio.750-1500MHzfloatRMSMeasured local RMS around the detection in mJy/beam per 44.1km/s channelmJyinstr.det.noisefloatHRVOptical heliocentric velocitykm/sspect.dopplerVeloc.opt;pos.heliocentricintW20The measured line width at 20% of the peak fluxkm/sspect.line.widthintW50The measured line width at 50% of the peak fluxkm/sspect.line.widthintlog(MHI)Logarithm of the HI masslog(solMass)phys.massfloatFlag[1/2]? Detection flag (1)meta.code.errorintnullableNotesNotes on galaxies (2)meta.notecharJ/MNRAS/528/542/table3HI parameters of galaxies in groups_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupName of groupmeta.idcharRegionEnvironment in which group was foundobs.fieldcharNoGroup member identifiermeta.idcharNameName of galaxy, LV-SMGPS identifier, JHHMMSS+DDMMSSmeta.id;meta.maincharGLONGalactic longitude (deg)degpos.galactic.lonGLATGalactic latitude (deg)degpos.galactic.latHVOptical heliocentric velocitykm/sspect.dopplerVeloc.opt;pos.heliocentricintW20The measured line width at 20% of the peak fluxkm/sspect.line.widthintW50The measured line width at 50% of the peak fluxkm/sspect.line.widthintlog(MHI)Logarithm of the HI masslog(solMass)phys.massfloatlog(Mdyn)Logarithm of the dynamical masslog(solMass)phys.massfloatlog(Mhalo)? Logarithm of the total dynamical mass of the grouplog(solMass)phys.massfloatnullableS? Compactness parametermeta.code;phys.sizefloatnullabledproj? Maximum projected distance between the members of groupkpcpos.distance;stat.maxintnullable