J/MNRAS/548/G621ivo://CDS.VizieR/J/MNRAS/548/G621CDSFerreira F.A.Angelo M.S.Santos J.F.C. JrCorradi W.J.B.Maia F.F.S.2026-05-27T06:34:34Z2026-05-27T07:33:03ZCDS support team

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

cds-question@unistra.frmilky-way-galaxystellar-associationsvisible-astronomyWe report the discovery of 31 new open clusters (OCs) identified in Gaia DR3 data through a systematic search over 220 adjacent 1{deg}*1{deg} fields towards the Galactic anticentre, in the direction of the Perseus arm gap. Eight of them display low-density structures, possibly indicating open cluster remnants properties. The objects were identified and characterized through a combined analysis of photometric, kinematic, and spatial distributions, a methodology successfully applied in our previous works. Their structural properties, mean proper motions, ages, distances and reddening were derived and their centres cross-matched with the available catalogues. The clusters are low-concentrated systems and are mostly located within $34$ kpc. They do not belong to the Perseus arm, but may be associated with the Outer Norma arm. The Gulf of Camelopardalis region appears as an interruption in the Perseus arm, possibly reflecting low star-formation activity, dust obscuration, or that the Milky Way is a flocculent, rather than a grand-design spiral galaxy.2026MNRAS.548g.621Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/548/G621CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/548/G621https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/548/G621http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/548/G621https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/548/G621https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/548/G621http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/548/G621GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/548/G621/ufgmcat (OCs astrometric, astrophysical and structural parameters derived for each discovered OC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/548/G621/ufgmcat?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/548/G621/ufgmcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/548/G621/ufgmcat?GETtext/xml+votable180.050000true59.4352.730.005555555555555556Cone search capability for table J/MNRAS/548/G621/members (Memberlists of the set of OCs discovered in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/548/G621/members?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/548/G621/members?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/548/G621/members?GETtext/xml+votable180.050000true61.962656757.97228640.005555555555555556Cone search capability for table J/MNRAS/548/G621/detected (OCs from literature detected by our method, their parameters were taken from the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/548/G621/detected?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/548/G621/detected?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/548/G621/detected?GETtext/xml+votable180.050000true47.9737733563.214635440.005555555555555556Cone search capability for table J/MNRAS/548/G621/census (OCs census in the region covered in this work, their parameters were taken from the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/548/G621/census?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/548/G621/census?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/548/G621/census?GETtext/xml+votable180.050000true42.885601043756.809501647950.0055555555555555564/114 120 122 5/413 439 445-447 450 454 460 788-789 797 799 817-820 823 832 834 840 6/1623 1629 1631 1660-1662 1746-1748 1750-1753 1755 1772-1773 1775-1776 1778 1794-1795 1798-1799 1804 1807 1809-1811 1814-1815 1821 1844 1846 1848-1850 1852 1854 1936 1938 1944 1946 3135 3141-3143 3145 3147-3149 3151 3160 3162-3163 3165 3167-3170 3174-3175 3177 3180 3182-3184 3186-3187 3192 3195 3227 3229-3231 3265 3267 3284-3286 3288-3290 3301 3312-3313 3317 3332 3334 3340 3364 3368-3370https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/548/G621?format=asciiOpticaldefaultJ/MNRAS/548/G621/ufgmcatOCs astrometric, astrophysical and structural parameters derived for each discovered OCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_DensCritCluster critical density error (E_DENS_CRITICA)stat.errordouble_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedClId[7/234] Internal cluster ID (clu_id)meta.idintNameName, UFMGNNN (name)meta.id;meta.maincharRA_ICRSCluster center right ascension (ICRS) at Ep=2016.0 (ra)degpos.eq.ra;meta.mainDE_ICRSCluster center declination (ICRS) at Ep=2016.0 (dec)degpos.eq.dec;meta.mainrtTidal radius in arcsec (rt)arcsecphys.angSize;srcfloate_rtTidal radius error in arcsec (e_rt)arcsecstat.errordoublercCore radius in arcsec (rc)arcsecphys.angSize;srcfloate_rcCore radius error in arcsec (e_rc)arcsecstat.errordoublerlimLimiting radius in arcsec (rlim)arcsecphys.angSize;srcinte_rlimLimiting radius error in arcsec (e_rlim)arcsecstat.errorintrtpcTidal radius in pc (rt_pc)pcphys.size.radiusfloate_rtpcTidal radius error in pc (e_rt_pc)pcstat.errordoublercpcCore radius in pc (rc_pc)pcphys.size.radiusdoublee_rcpcCore radius error in pc (e_rc_pc)pcstat.errordoublec? Concentration parameter c=log(rt/rc) (c)stat.fit.paramdoublenullablelogtAge (LOGT)log(yr)time.agefloate_logtUncertainty on Age (E_LOGT)log(yr)stat.errorfloatModDistDistance modulus (MODDIST)phot.mag.distModfloate_ModDistUncertainty on distance modulus (E_MODDIST)stat.errorfloatE(B-V)Colour excess E(B-V) (EBV)magphot.color.excessfloate_E(B-V)Uncertainty on colour excess E(B-V) (E_EBV)magstat.errorfloatDistDistance in pc (DIST)pcpos.distancedoublee_DistUncertainty on distance in pc (E_DIST)pcstat.errordoublepmRACluster proper motion along RA, pmRA*cosDE (PMRA)mas/yrpos.pm;pos.eq.radoubles_pmRAStandard deviation on pmRA (S_PMRA)mas/yrstat.stdev;pos.pm;pos.eq.radoublepmDECluster proper motion along DE (PMDE)mas/yrpos.pm;pos.eq.decdoubles_pmDEStandard deviation on pmDE (S_PMDE)mas/yrstat.stdev;pos.pm;pos.eq.decdoubleplxCluster mean parallax (PLX) (PLX)maspos.parallax.trigdoubles_plxStandard deviation on plx (S_PLX)masstat.stdev;pos.parallaxdoubleNmemberNumber of cluster stars (N_MEMBER)meta.numberintGLONGalactic Longitude (l)degpos.galactic.lonGLATGalactic Latitude (b)degpos.galactic.latdoubleXX coordinate in Galactic coordinates (X)pos.cartesian.x;pos.galacticdoubleYY coordinate in Galactic coordinates (Y)pos.cartesian.y;pos.galacticdoubleZZ coordinate in Galactic coordinates (Z)src.redshift;pos.galacticdoubleXgalX distance from Galactic centre assuming the Sun is at 8340pc (X_gal)pos.cartesian.x;pos.galacticdoubleRgcDistance from Galactic centre assuming the Sun is at 8340pc (Rgc)pos.distancedoubleR50Radius containing half the members (R50)phys.angSize;srcdoubleClIndexInternal cluster ID (CLU_INDEX)meta.idintMassCluster mass inside R50 (MASS)solMassphys.massdoubleRJacobCluster jacob radius in pc (R_JACOB)pcphys.size.radiusdoublee_RJacobCluster Jacobi radius error in pc (E_R_JACOB)pcstat.errordoubleDensCluster density (DENS)phys.densitydoublee_DensCluster density error (E_DENS)stat.errordoubleDensCritCluster critical density (DENS_CRI)src.densitydoubleClusterCluster name (cluster)meta.idcharJ/MNRAS/548/G621/membersMemberlists of the set of OCs discovered in this work_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClId[7/234] Internal cluster ID (clu_id)meta.id.parentintGaiaDR2Unique source identifier (unique within a particular Data Release) (GAIA_DR2_NAME)meta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2016.0 (RA)degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0 (DEC)degpos.eq.dec;meta.mainplxParallax (plx)maspos.parallax.trigfloate_plxStandard error of parallax (e_plx)masstat.error;pos.parallaxfloatpmRAProper motion in right ascension direction, pmRA*cosDE (pmRA)mas/yrpos.pm;pos.eq.radoublee_pmRAStandard error of proper motion in right ascension direction (e_pmRA)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination direction (pmDEC)mas/yrpos.pm;pos.eq.decdoublee_pmDEStandard error of proper motion in declination direction (e_pmDEC)mas/yrstat.error;pos.pm;pos.eq.decfloatGmagG-band mean magnitude (Gmag)magphot.mag;em.optfloate_GmagStandard error of G-band mean magnitude (e_Gmag)magstat.error;phot.magfloatBPmagIntegrated BP mean magnitude (BPmag)magphot.mag;em.opt.Bfloate_BPmagStandard error of BP mean magnitude (e_BPmag)magstat.error;phot.magfloatRPmagIntegrated RP mean magnitude (RPmag)magphot.mag;em.opt.Rfloate_RPmagStandard error of RP mean magnitude (e_RPmag)magstat.error;phot.magfloatchi2chi^2^ value (chi^2)stat.fit.chi2;stat.valuedoubleNgALNumber of good observations AL (NgAL)meta.numberintE(BP/RP)BP/RP excess factor (E(BP/RP))magphot.color.excessdoubleNperNumber of visibility periods used in Astrometric solution (Nper)meta.numberintpmRApmDECcorCorrelation between proper motion in right ascension and proper motion in declination (pmRApmDECcor)pos.pm;pos.eq.radoubleplxpmRAcorCorrelation between parallax and proper motion in right ascension (plxpmRAcor)stat.correlation;pos.pm;pos.eq.rafloatplxpmDECcorCorrelation between parallax and proper motion in declination (plxpmDECcor)stat.correlation;pos.pm;pos.eq.decfloatprobAstromAstrometric membership (prob_astrometrica)meta.code.memberdoublepClMember[0/1] cluster members have flag=1 (flg_member)meta.code.memberintJ/MNRAS/548/G621/detectedOCs from literature detected by our method, their parameters were taken from the literaturer_NameLiterature (ref) (1)meta.ref;pos.framecharDiama[0/6]? Apparent diameter=2*r_lim (diam_a)arcminphys.angSizeintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNTile[0/219] Field where the OC was detected (N_TILE)obs.fieldintNameCandInternal OC name (NAME_cand)meta.id;meta.maincharpmRAFieldMean field proper motion along RA, pmRA*cosDE (PMRA_FIELD)mas/yrpos.pm;pos.eq.radoublepmDEFieldMean field proper motion along DECmas/yrpos.pm;pos.eq.decdoubleNamecatalogue name (Name)meta.id;meta.tablecharRAJ2000Cluster center right ascension (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Cluster center declination (J2000) (DEC)degpos.eq.dec;meta.mainplx? Cluster mean parallax (plx)maspos.parallax.trigdoublenullablee_plx? Standard deviation on plx (e_plx)masstat.error;pos.parallaxdoublenullablepmRA? Proper motion along RA, pmRA*cosDE (pmRA)mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Standard deviation on pmRA (e_pmra)mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper motion along DEC (pmDE)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Standard deviation on pmDE (e_pmde)mas/yrstat.error;pos.pm;pos.eq.decdoublenullablerlim? Limiting radius in arcmin (rlim)arcminphys.angSizedoublenullablee_rlim? rms uncertainty on rlim (e_rlim)arcminstat.errordoublenullablelogt? Age (logt)log(yr)time.agedoublenullablee_logt? rms uncertainty on logt (e_logt)log(yr)stat.errorfloatnullableModDist? Distance modulus (dist_moddist)phot.mag.distModdoublenullableDist? Distance in pc (distance)pcpos.distancedoublenullableE(B-V)? Reddening E(B-V) (E_B_V)magphot.color.excessdoublenullablee_E(B-V)? rms uncertainty on E(B-V) (e_E_B_V)magstat.errorfloatnullableNmember? Number of members (N_member)meta.numberintnullableX? X coordinate in Galactic coordinates (X)pos.cartesian.x;pos.galacticdoublenullableXgal? X distance from Galactic centre assuming the Sun is at 8340pc (X_gal)pos.cartesian.x;pos.galacticdoublenullableY? Y coordinate in Galactic coordinates (Y)pos.cartesian.y;pos.galacticdoublenullableZ? Z coordinate in Galactic coordinates (Z)src.redshift;pos.galacticdoublenullableRgc? Distance from Galactic centre assuming the Sun is at 8340pc (RGC)pos.distancedoublenullableJ/MNRAS/548/G621/censusOCs census in the region covered in this work, their parameters were taken from the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster name (Name)meta.id;meta.maincharRefliterature (ref) (1)meta.ref;pos.framecharRAJ2000Cluster center right ascension (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Cluster center declination (J2000) (DEC)degpos.eq.dec;meta.mainGLON? Galactic longitude (GLON)degpos.galactic.lonnullableGLAT? Galactic latitude (GLAT)degpos.galactic.latdoublenullableplx? Cluster mean parallax (plx)maspos.parallax.trigdoublenullablee_plx? Standard deviation on plx (e_plx)masstat.error;pos.parallaxdoublenullablepmRA? Proper motion along RA, pmRA*cosDE (pmRA)mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Standard deviation on pmRA (e_pmra)mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper motion along DEC (pmDE)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Standard deviation on pmDE (e_pmde)mas/yrstat.error;pos.pm;pos.eq.decdoublenullablerlim? Limiting radius (rlim)pcphys.size.radiusdoublenullablee_rlim? rms uncertainty on rlim (e_rlim)pcstat.errordoublenullablelogt? Age (logt)log(yr)time.agedoublenullablee_logt? rms uncertainty on logt (e_logt)log(yr)stat.errorfloatnullableDist? Distance in pc (distance)pcpos.distancedoublenullablee_Dist? rms uncertainty on Dist (e_Dist)pcstat.errordoublenullableE(B-V)? Reddening (E_B_V)magphot.color.excessdoublenullablee_E(B-V)? rms uncertainty on E(B-V) (e_E_B_V)magstat.errorfloatnullableNmember? Number of members (N_member)meta.numberintnullableX? X coordinate in Galactic coordinates (x)pos.cartesian.x;pos.galacticdoublenullableXgal? X distance from Galactic centre assuming the Sun is at 8340pc (x_gal)pos.cartesian.x;pos.galacticdoublenullableY? Y coordinate in Galactic coordinates (y)pos.cartesian.y;pos.galacticdoublenullableZ? Z coordinate in Galactic coordinates (z)src.redshift;pos.galacticdoublenullableRgc? Distance from Galactic centre assuming the Sun is at 8340pc (Rgc)pos.distancedoublenullable