J/MNRAS/529/L88ivo://CDS.VizieR/J/MNRAS/529/L88CDSSteyn N.Kraan-korteweg R.C.Rajohnson S.H.A.Kurapati S.Chen H.,Frank B.Serra P.Staveley-smith L.Camilo F.Goedhart S.2026-08-11T06:46:20Z2026-08-11T07:45:23ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsgalaxy-planesmilky-way-galaxysurveysh-i-line-emissionradial-velocityThis paper presents the first HI results extracted from the South African Radio Astronomy Observatory (SARAO) MeerKAT Galactic Plane Survey (SMGPS) - a narrow strip (|b|<1.5deg) along the southern Milky Way. The primary goal consisted in tracing the great attractor (GA) wall across the innermost zone of avoidance. We reduced a segment spanning the longitude range 302deg<l<332deg for the redshift range z < 0.08. The superb SMGPS sensitivity (rms=0.3-0.5mJy/beam- per 44km/s channel) and angular resolution (~31"x26") lead to a detection limit of log(MHI/M_{sun}_)<8.5 at the GA distance (Vhel~3500-6500km/s). A total of 477 galaxy candidates were identified over the full redshift range. A comparison of the few HI detections with counterparts in the literature (mostly HIZOA) found the HI fluxes and other HI parameters to be highly consistent. The continuation of the GA wall is confirmed through a prominent overdensity of N=214 detections in the GA distance range. At higher latitudes, the wall moves to higher redshifts, supportive of a possible link with the Ophiuchus cluster located behind the Galactic Bulge. This deep interferometric HI survey demonstrates the power of the SMGPS in improving our insight of large-scale structures at these extremely low latitudes, despite the high obscuration and continuum background.2024MNRAS.529L..88Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/529/L88CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/528/542 : SMGPS Local Void HI galaxy catalogue (Kurapati+, 2024)J/A+A/695/A144 : SMGPS extended source catalogue (Bordiu+, 2025)J/MNRAS/546/F1849 : SMGPS compact source catalogue (Mutale+, 2026)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/529/L88https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/529/L88http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/529/L88https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/529/L88https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/529/L88http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/529/L88GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/529/L88/ga-smgps (GA-SMGPS HI galaxy catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/529/L88/ga-smgps?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/529/L88/ga-smgps?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/529/L88/ga-smgps?GETtext/xml+votable180.050000true190.4199-62.033070.0055555555555555565/10414-10415 10419 10421 10441-10445 10450-10454 10624 6/41471 41594-41595 41597-41599 41631 41651-41654 41672-41674 41680 41682-41683 41688-41689 41692 41696-41697 41699-41701 41754-41755 41757-41759 41763 41785-41786 41795 41798-41799 41820 41824-41826 41828 41856 42155 42157-42159 42168 42170 42500-42501 42512-42513 43024-430261.1343831186515773e-24 1.1343831186515773e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/529/L88?format=asciiRadiodefaultJ/MNRAS/529/L88/ga-smgpsGA-SMGPS HI galaxy cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSMGPS name (SMGPS-HI-JHHMMSS+DDMMSS)meta.id;meta.maincharMosaicMosaic in which the galaxy is measured (T10 - T19)obs.fieldcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latFpeakPeak flux density (in 856-1712MHz band )Jyphot.flux.density;em.radio.750-1500MHzfloatFintIntegrated flux (in 856-1712MHz band )Jy.km/sphot.flux.density;em.radio.750-1500MHzfloate_FintIntegrated flux errorJy.km/sstat.errorfloat_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.decindexedRMSMeasured local RMS around the detection in mJy/beam per channelmJystat.errorfloatHRVOptical 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)HI masslog(solMass)phys.massfloatFlagFlag (1)meta.code.errorintNoteCounterpart names or any other note (JHHMM-DD names represent HIZOA galaxies)meta.notecharNote2[1/2] Additional note (2)meta.notechar