J/A+A/707/A275ivo://CDS.VizieR/J/A+A/707/A275CDSJadhav V.V.Rao K.K.Reggiani E.2026-03-19T07:05:45Z2026-03-19T08:04:29ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyopen-star-clustersastrometryvisible-astronomyphotometryproper-motionstrigonometric-parallaxinfrared-astronomyultraviolet-astronomystellar-radiieffective-temperatureWe have compiled a list of blue lurker (BL) candidates in open clusters using the available rotation catalogs. Blue lurkers are rejuvenated main-sequence stars hidden among normal main-sequence stars on color-magnitude diagrams of star clusters. In comparison to BLs, blue straggler stars, which formed via similar mass transfers or mergers, occupy a distinct space in color-magnitude diagrams. Blue lurkers can be identified by their unusually faster rotation compared to similar mass stars, which is a signature of recent accretion, or by the presence of a companion (e.g., an extremely low mass white dwarf), which can only be formed by mass donation. We searched for fast-rotating stars on the main sequence of open clusters using Kepler, TESS, and spectroscopic rotation indicators, such as rotation periods and vsini measurements. We identified 97 new BL candidates across 35 open clusters, almost tripling the previously known sample of 36. Based on the estimated completeness of ~3%, thousands of BLs are likely hidden within the cluster population. Detailed spectroscopic and time series analyses will be essential to confirming their mass-transfer histories.2026A&A...707A.275Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A275CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/688/A152 : UOCS. XIV. blue lurkers in NGC 752 (Jadhav+, 2024)J/A+A/676/A47 : UOCS study of NGC 6791 (Jadhav+, 2023)J/A+A/676/A129 : Gaia-ESO catalogue version 5.1 (Hourihane+, 2023)J/A+A/674/A152 : Cool star rotation periods in NGC 2281 (Fritzewski+, 2023)J/AJ/168/205 : WIYN open cl. XC. RVs & orbital param. in NGC 2506J/AJ/139/1383 : Radial velocities in M35 (NGC 2168) (Geller+, 2010)J/ApJ/944/39 : Rot. vel. & inclinations in stars of open clustersJ/ApJ/904/140 : Ruprecht 147 members & rot. data for 5 other cl.J/ApJ/879/100 : K2 rotation periods for Hyades & Praesepe membersJ/MNRAS/503/236 : UVIT catalog and membership of 6 open clusters (Jadhav+,2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)II/311 : WISE All-Sky Data Release (Cutri+ 2012)II/389 : The Pan-STARRS release 1 (PS1) Survey - DR2 (Magnier+, 2025)II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A275https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/707/A275http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/707/A275https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/707/A275https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/707/A275http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/707/A275GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/707/A275/cluster (Open cluster in our study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A275/cluster?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A275/cluster?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A275/cluster?GETtext/xml+votable180.050000true134.4041667-43.15055560.005555555555555556Cone search capability for table J/A+A/707/A275/table1 (The catalog of new and previously known blue lurker candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A275/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A275/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A275/table1?GETtext/xml+votable180.050000true134.343195-43.030158060.0055555555555555566/1770 2436 3091 3136-3137 4078 4298 4696 4698-4699 4722 6149 6719 6760 13198 14336 14573 14575 14752-14753 14782 15121 16488-16490 20562 21519 21550 21567 21586 21682 21717-21719 22239 22433 23638 23745 24339 24344-24345 24522 28823 29728 29730 32089 33330 37790 37886 39181 39192 39252 39343 39354 39692 39714 41649 42177 42464 430341.3088508223161842e-20 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/707/A275?format=asciiUVOpticalInfrareddefaultJ/A+A/707/A275/clusterOpen cluster in our studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterHost cluster name (Cluster)meta.id.parentcharRAJ2000Right ascension from simbad (J2000)pos.eq.ra;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullableDEJ2000Declination from simbad (J2000)pos.eq.dec;meta.mainNbrNumber of source occurences in table1.datmeta.numberintJ/A+A/707/A275/table1The catalog of new and previously known blue lurker candidatesUmag? Synthetic Gaia DR3 U band magnitude (Gaia)magphot.mag;em.opt.UfloatnullableF169Mmag? AstroSat/UVIT F169M band magnitudemagphot.mag;em.UVfloatnullable_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.decindexedSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source_idmeta.id;meta.mainClusterHost cluster namemeta.id.parentcharRefRotReference for rotational info (1)meta.bibcharRefIDReference which identified the blue lurker candidate (1)meta.bibcharCommentComment indicating evidence from the literature for UV excess emission or radial velocities inconsistent with the clustermeta.notecharvsini? Mean v*sin(i); projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini? Error in vsinikm/sstat.error;phys.veloc.rotatfloatnullableProt? Photometric rotation perioddtime.periodfloatnullablee_Prot? Error in Protdstat.errorfloatnullableRA_ICRSRight ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainPlxParallax (Gaia)maspos.parallaxfloatpmRAProper motion in R.A. direction (pmRA*cosDE, Gaia)mas/yrpos.pm;pos.eq.radoublepmDEProper motion in Dec. direction (Gaia)mas/yrpos.pm;pos.eq.decdoubleRV? Radial velocity (Gaia)km/sphys.veloc;pos.heliocentricdoublenullableSimbadSimbad Identifiermeta.idcharSimbadTypesSimbad object typessrc.classcharAge? Age of the host clusterMyrtime.ageintnullableAV? Cluster extinction in V bandmagphys.absorptionfloatnullablee_AV? Error in the cluster AVmagstat.errorfloatnullable[Fe/H]Cluster metallicityphys.abund.ZfloatDistCluster distancepcpos.distancedoublee_DistError in the cluster distancepcstat.errordoubleGmagGaia DR3 G band magnitude (Gaia)magphot.mag;em.optfloate_GmagError in Gmagmagstat.error;phot.magfloatBPmagGaia DR3 Gbp band magnitude (Gaia)magphot.mag;em.opt.Bfloate_BPmagError in Gbpmagmagstat.error;phot.magfloatRPmagGaia DR3 Grp band magnitude (Gaia)magphot.mag;em.opt.Rfloate_RPmagError in Grpmagmagstat.error;phot.magfloatF606Wmag? Synthetic Gaia DR3 HST/ACS/WFC F606W band magnitude (Gaia)magphot.mag;em.opt.Rfloatnullablee_F606Wmag? Error in F606Wmagmagstat.errorfloatnullableF814Wmag? Synthetic Gaia DR3 HST/ACS/WFC F814W band magnitude (Gaia)magphot.mag;em.opt.Ifloatnullablee_F814Wmag? Error in F814Wmagmagstat.errorfloatnullablee_Umag? Error in Umagmagstat.error;phot.magfloatnullableBmag? Synthetic Gaia DR3 B band magnitude (Gaia)magphot.mag;em.opt.Bfloatnullablee_Bmag? Error in Bmagmagstat.error;phot.magfloatnullableVmag? Synthetic Gaia DR3 V band magnitude (Gaia)magphot.mag;em.opt.Vfloatnullablee_Vmag? Error in Vmagmagstat.error;phot.magfloatnullableRmag? Synthetic Gaia DR3 R band magnitude (Gaia)magphot.mag;em.opt.Rfloatnullablee_Rmag? Error in Rmagmagstat.error;phot.magfloatnullableImag? Synthetic Gaia DR3 I band magnitude (Gaia)magphot.mag;em.opt.Ifloatnullablee_Imag? Error in Imagmagstat.error;phot.magfloatnullableW1mag? WISE W1 band magnitude (WISE)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error in W1magmagstat.error;phot.magfloatnullableW2mag? WISE W2 band magnitude (WISE)magphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error in W2magmagstat.error;phot.magfloatnullableW3mag? WISE W3 band magnitude (WISE)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? Error in W3magmagstat.error;phot.magfloatnullableFUVmag? GALEX FUV band magnitude (GALEX)magphot.mag;em.UVfloatnullablee_FUVmag? Error in FUVmagmagstat.error;phot.magfloatnullableNUVmag? GALEX NUV band magnitude (GALEX)magphot.mag;em.UVfloatnullablee_NUVmag? Error in NUVmagmagstat.error;phot.magfloatnullablePS1gmag? PanSTARRS DR1 g band magnitude (PanSTARRS)magphot.mag;em.opt.Bfloatnullablee_PS1gmag? Error in PS1_gmagmagstat.error;phot.magfloatnullablePS1rmag? PanSTARRS DR1 r band magnitude (PanSTARRS)magphot.mag;em.opt.Rfloatnullablee_PS1rmag? Error in PS1_rmagmagstat.error;phot.magfloatnullablePS1imag? PanSTARRS DR1 i band magnitude (PanSTARRS)magphot.mag;em.opt.Ifloatnullablee_PS1imag? Error in PS1_imagmagstat.error;phot.magfloatnullablePS1zmag? PanSTARRS DR1 z band magnitude (PanSTARRS)magphot.mag;em.opt.Ifloatnullablee_PS1zmag? Error in PS1_zmagmagstat.error;phot.magfloatnullablePS1ymag? PanSTARRS DR1 y band magnitude (PanSTARRS)magphot.mag;em.IR.Jfloatnullablee_PS1ymag? Error in PS1_ymagmagstat.error;phot.magfloatnullableSDSSumag? SDSS DR13 u band magnitude (SDSS)magphot.mag;em.opt.Ufloatnullablee_SDSSumag? Error in SDSS_umagmagstat.error;phot.magfloatnullableSDSSgmag? SDSS DR13 g band magnitude (SDSS)magphot.mag;em.opt.Bfloatnullablee_SDSSgmag? Error in SDSS_gmagmagstat.error;phot.magfloatnullableSDSSrmag? SDSS DR13 r band magnitude (SDSS)magphot.mag;em.opt.Rfloatnullablee_SDSSrmag? Error in SDSS_rmagmagstat.error;phot.magfloatnullableSDSSimag? SDSS DR13 i band magnitude (SDSS)magphot.mag;em.opt.Ifloatnullablee_SDSSimag? Error in SDSS_imagmagstat.error;phot.magfloatnullableSDSSzmag? SDSS DR13 z band magnitude (SDSS)magphot.mag;em.opt.Ifloatnullablee_SDSSzmag? Error in SDSS_zmagmagstat.error;phot.magfloatnullableJmag? 2MASS J band magnitude (2MASS)magphot.mag;em.IR.Jfloatnullablee_Jmag? Error in Jmagmagstat.error;phot.magfloatnullableHmag? 2MASS H band magnitude (2MASS)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error in Hmagmagstat.error;phot.magfloatnullableKsmag? 2MASS Ks band magnitude (2MASS)magphot.mag;em.IR.Kfloatnullablee_Ksmag? Error in Ksmagmagstat.error;phot.magfloatnullableF148Wmag? AstroSat/UVIT F148W band magnitudemagphot.mag;em.UVfloatnullablee_F148Wmag? Error in F148Wmagmagstat.errorfloatnullableF154Wmag? AstroSat/UVIT F154W band magnitudemagphot.mag;em.UVfloatnullablee_F154Wmag? Error in F154Wmagmagstat.errorfloatnullablee_F169Mmag? Error in F169Mmagmagstat.errorfloatnullableN245Mmag? AstroSat/UVIT N245M band magnitudemagphot.mag;em.UVfloatnullablee_N245Mmag? Error in N245Mmagmagstat.error;phot.magfloatnullableN263Mmag? AstroSat/UVIT N263M band magnitudemagphot.mag;em.UVfloatnullablee_N263Mmag? Error in N263Mmagmagstat.error;phot.magfloatnullableUVOTUmag? SWIFT/UVOT U band magnitudemagphot.mag;em.opt.Ufloatnullablee_UVOTUmag? Error in Umagmagstat.error;phot.magfloatnullableUVOTUVW1mag? SWIFT/UVOT UVW1 band magnitudemagphot.mag;em.UVfloatnullablee_UVOTUVW1mag? Error in UVW1magmagstat.error;phot.magfloatnullableUVOTUVM2mag? SWIFT/UVOT UVM2 band magnitudemagphot.mag;em.UVfloatnullablee_UVOTUVM2mag? Error in UVM2magmagstat.error;phot.magfloatnullableUVOTUVW2mag? SWIFT/UVOT UVW2 band magnitudemagphot.mag;em.UVfloatnullablee_UVOTUVW2mag? Error in UVW2magmagstat.error;phot.magfloatnullableNuvEx? Number of points whose UV flux leaves more than 0.3 fractional residualmeta.numberintnullableTeff? SED based effective temperatureKphys.temperature.effectiveintnullableb_Teff? Lower bound (16th perc.) of TeffKphys.temperature.effective;stat.minintnullableB_Teff? Upper bound (84th perc.) of TeffKphys.temperature.effective;stat.maxintnullablelogg? SED based surface gravitylog(cm.s**-2)phys.gravityfloatnullableRad? SED based radiussolRadphys.size.radiusfloatnullableb_Rad? Lower bound (16th percentile) of RadsolRadphys.size.radius;stat.minfloatnullableB_Rad? Upper bound (84th percentile) of RadsolRadphys.size.radius;stat.maxfloatnullableLum? SED based luminositysolLumphys.luminosityfloatnullableb_Lum? Lower bound (16th percentile) of LumsolLumphys.luminosity;stat.minfloatnullableB_Lum? Upper bound (84th percentile) of LumsolLumphys.luminosity;stat.maxfloatnullablechi2r? Reduced chi2 of the SED fitstat.fit.chi2floatnullablevgfb2? The vgfb2 value of the SED fitstat.fit.paramfloatnullable