J/AJ/158/68ivo://CDS.VizieR/J/AJ/158/68doi:10.26093/cds/vizier.51580068CDSLata S.Pandey A.K.Yadav R.K.Richichi A.Irawati P.Panwar N.,Dhillon V.S.Marsh T.R.2019-10-01T11:56:09Z2019-09-30T13:25:25ZCDS support team

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

cds-question@unistra.fropen-star-clustersvariable-starspre-main-sequence-starsinfrared-photometryvisible-astronomyWide-band photometrystellar-massesstellar-ageseffective-temperatureWe present time-series photometry in the field of Stock 8 and identified 130 short-period variable stars. Twenty-eight main-sequence and 23 pre-main-sequence variables are found to be part of cluster Stock 8. The main-sequence variables are classified as slow pulsators of the B-type, {beta} Cep, and {delta} Scuti stars. Fourteen main-sequence stars could be new class variables as discussed by Mowlavi et al. (2013, J/A+A/554/A108) and Lata et al. (2011MNRAS.418.1346L; 2012MNRAS.427.1449L; 2014, J/MNRAS/442/273; 2016MNRAS.456.2505L). The age and mass of pre-main-sequence variables are found to be ~<5 Myr and in the mass range of 0.5-2.8 M_{sun}_, respectively. These pre-main-sequence stars could be T-Tauri variables. We have found 5 and 2 of 23 pre-main-sequence variables as classical T-Tauri stars and Herbig Ae/Be stars, respectively, whereas 16 pre-main-sequence stars are classified as weak-line T-Tauri stars.2019AJ....158...68Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/311 : WISE All-Sky Data Release (Cutri+ 2012)J/MNRAS/384/1675 : BVRIc photometry of Stock 8 (Jose+, 2008)J/A+A/554/A108 : Periodic variables in NGC 3766 (Mowlavi+, 2013)J/ApJ/836/98 : YSOs search in Stock 8 with opt. to IR photom. (Jose+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/68https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/158/68/table3 (The photometric data, period, amplitude, time of maximum brightness and classification of 130 variables in the region of Stock 8)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/68/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/68/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/68/table3?GETtext/xml+votable180.050000true81.8085280634.582028060.0055555555555555566/1297 12998.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/158/68?format=asciiOpticalInfrareddefaultJ/AJ/158/68/table2Data for the variable starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDVariable identifier (VNNN)meta.id;meta.maincharJDJulian Date of observationdtime.epochdoubleVmag[9.305/20.927] Apparent V band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.001/0.533] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatJ/AJ/158/68/table3The photometric data, period, amplitude, time of maximum brightness and classification of 130 variables in the region of Stock 8LCLight curvemeta.ref.urlchar(U-B)[-0.67/0.929]? The (U-B) color (1)magphot.color;em.opt.U;em.opt.BfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDVariable identifier (VNNN)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag[8.953/18.877]? Apparent V band magnitude (1)magphot.mag;em.opt.Vfloatnullable(B-V)[0.19/6.442]? The (B-V) color (1)magphot.color;em.opt.B;em.opt.Vfloatnullable(V-I)[0.282/3.604]? The (V-I) color (1)magphot.color;em.opt.V;em.opt.IfloatnullableJmag[7.124/16.052]? Apparent 2MASS J band magnitude (2)magphot.mag;em.IR.JfloatnullableHmag[5.671/15.706]? Apparent 2MASS H band magnitude (2)magphot.mag;em.IR.HfloatnullableKsmag[4.75/15.065]? Apparent 2MASS K_s_ band magnitude (2)magphot.mag;em.IR.KfloatnullablePer[0.050593/0.64886] Probable perioddtime.perioddoubleAmp[0.008/0.456] The V band amplitudemagsrc.var.amplitude;em.opt.VfloatT0[15.28156/450.124711] Date of maximum brightness; JD-2457000dtime.epochdoubleProb[0/1] Variability probabilitysrc.varfloatc1Classification of star from Jose et al. (2017, J/ApJ/836/98)src.classcharc2Present classification of variable (3)src.classJ/AJ/158/68/table4Mass and age of probable PMS starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDVariable identifier (VNNN)meta.id;meta.maincharMassCMD[0.55/2.75]? Mass estimated from V/(V-I) color-magnitude diagram (CMD)solMassphys.massfloatnullablee_MassCMD[0.01/0.15]? Uncertainty in MassCMDsolMassstat.errorfloatnullablel_AgeCMD[><= ] Limit flag on AgeCMDmeta.code.errorcharAgeCMD[0.01/10]? Age estimated from V/(V-I) CMDMyrtime.agefloatnullablee_AgeCMD[0.01/1.01]? Uncertainty in AgeCMDMyrstat.errorfloatnullableMassSED[1.01/5.68]? Mass estimated from the spectral energy distribution (SED) analysissolMassphys.massfloatnullablee_MassSED[0.14/1.37]? Uncertainty in MassSEDsolMassstat.errorfloatnullableAgeSED[0.28/6.39]? Age estimated from the SED analysisMyrtime.agefloatnullablee_AgeSED[0.12/3.3]? Uncertainty in AgeSEDMyrstat.errorfloatnullableJ/AJ/158/68/table5The effective temperature (T_eff_), bolometric correction (BC), bolometric magnitude (M_bol_), and luminosity (L)BC[-2.25/0.1406] Bolometric correctionmagphot.mag.bcdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDVariable identifier (VNNN)meta.id;meta.maincharlogTeff[3.95/4.411] Log effective temperaturelog(K)phys.temperature.effectivefloatMbol[-6.097/1.55] Bolometric magnitudemagphys.magAbs.boldoublelogL[1.273/4.332] Log luminosity (logL/L_{sun}_)log(solLum)phys.luminosity;em.optfloat