J/AJ/163/191ivo://CDS.VizieR/J/AJ/163/191doi:10.26093/cds/vizier.51630191CDSKoc S.Yontan T.Bilir S.Canbay R.Ak T.Banks T.Ak S.Paunzen E.2022-09-30T22:21:45Z2022-05-18T06:47:35ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomyphotometrytwo-color-diagramsproper-motionstrigonometric-parallaxThis study calculated astrophysical parameters, as well as kinematic and galactic orbital parameters, of the open clusters NGC1664 and NGC6939. The work is based on CCD ultraviolet, blue, and visual (UBV) and Gaia photometric and astrometric data from ground- and space-based observations. Considering Gaia Early Data Release 3 (EDR3) astrometric data, we determined membership probabilities of stars located in both of the clusters. We used two-color diagrams to determine the E(B-V) color excesses for NGC1664 and NGC6939 as 0.190{+/-}0.018 and 0.380{+/-}0.025mag, respectively. Photometric metallicities for the two clusters were estimated as [Fe/H]=-0.10{+/-}0.02dex for NGC1664 and as [Fe/H]=-0.06{+/-}0.01dex for NGC6939. Using the reddening and metallicity calculated in the study, we obtained distance moduli and ages of the clusters by fitting parsec isochrones to the color-magnitude diagrams based on the most likely member stars. Isochrone fitting distances are 1289{+/-}47pc and 1716{+/-}87pc, which coincide with ages of 675{+/-}50Myr and 1.5{+/-}0.2Gyr for NGC1664 and NGC6939, respectively. We also derived the distances to the clusters using Gaia trigonometric parallaxes and compared these estimates with the literature. We concluded that the results are in good agreement with those given by the current study. Present-day mass function slopes were calculated as {Gamma}=-1.22{+/-}0.33 and {Gamma}=-1.18{+/-}0.21 for NGC1664 and NGC6939, respectively, which are compatible with the Salpeter slope. Analyzes showed that both of clusters are dynamically relaxed. The kinematic and dynamic orbital parameters of the clusters were calculated, indicating that the birthplaces of the clusters are outside the solar circle.2022AJ....163..191Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/191CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2015)I/317 : The PPMXL Catalog (Roeser+ 2010)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)J/A+AS/133/387 : NGC 1817 and NGC 1807 proper motions (Balaguer-Nunnez+ 1998)J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/AJ/134/1216 : Abundance of NGC7142, 6939, & IC4756 stars (Jacobson+, 2007)J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)J/MNRAS/393/272 : Spectroscopy of red giants, 12 open clusters (Warren+, 2009)J/AJ/141/92 : BVI photometry of 10 distant open clusters (Janes+, 2011)J/A+A/543/A156 : Milky Way global survey of star clusters (Kharchenko+, 2012)J/AJ/145/107 : Zr, Ba, La, & Eu abund. in 19 open cluster (Jacobson+, 2013)J/A+A/558/A53 : Milky Way global survey star clusters II (Kharchenko+, 2013)J/MNRAS/430/3350 : Proper motions and membership in NGC 3766 (Yadav+, 2013)J/A+A/564/A79 : Proper motions of open clusters from UCAC4 (Dias+, 2014)J/MNRAS/453/1095 : NGC 6866 UBVRI photometry (Bostanci+, 2015)J/other/ApSS/355.267 : NGC 6811 CCD UBVRI photometry (Yontan+, 2015)J/other/ApSS/361.126 : NGC 6819 CCD UBV photometry (Ak+, 2016)J/other/ASpR/58.1900 : NGC 225 CCD UBV photometry (Bilir+, 2016)J/A+A/593/A116 : Open clusters within 1.8 kpc of the Sun (Joshi+, 2016)J/A+A/585/A101 : Milky Way global survey star clusters. V (Kharchenko+, 2016)J/AJ/153/99 : Galactic outer disk; field toward Tombaugh1 (Carraro+, 2017)J/A+A/600/A106 : RAVE open cluster pairs, groups & complexes (Conrad+, 2017)J/MNRAS/470/3937 : 1876 open clusters multimembership catalog (Sampedro+, 2017)J/AJ/153/57 : Shape parameters 154 Galactic open clusters (Zhai+, 2017)J/A+A/618/A93 : Gaia DR2 open clusters in Milky Way (Cantat-Gaudin+, 2018)J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)J/A+A/619/A155 : Open cluster kinematics with Gaia DR2 (Soubiran+, 2018)J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)J/A+A/623/A80 : Open clusters in APOGEE and GALAH surveys (Carrera+, 2019)J/MNRAS/490/1821 : Abundances stars in 18 open clusters (Casamiquela+, 2019)J/ApJS/245/32 : Newly identified star clusters in Gaia DR2 (Liu+, 2019)J/A+A/633/A99 : GaiaDR2 open clusters in Milky Way II (Cantat-Gaudin+, 2020)J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)J/A+A/635/A45 : 570 new open clusters in Galactic disc (Castro-Ginard+,2020)J/AJ/159/199 : OCCAM. IV. Open cluster abundances APOGEE DR16 (Donor+,2020)J/MNRAS/504/356 : Updated parameters of 1743 open clusters (Dias+, 2021)J/A+A/654/A20 : Plx zero-point offset from Gaia EDR3 (Groenewegen, 2021)J/A+A/652/A102 : 3794 open clusters parameters (Hao+, 2021)J/MNRAS/507/1699 : Blue straggler stars open clusters with Gaia (Jadhav+, 2021)J/A+A/647/A19 : 3D Kinematics and age of OCs (Tarricq+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/191https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/191http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/191https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/191https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/191http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/191GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/163/191/table5 (The catalogs for NGC 1664 and NGC 6939)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/191/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/191/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/191/table5?GETtext/xml+votable180.050000true72.51662543.67786940.0055555555555555566/1453 1458 1464 15594-155951.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/163/191?format=asciiOpticalInfrareddefaultJ/AJ/163/191/table5The catalogs for NGC 1664 and NGC 6939recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster identifiermeta.id.parentcharID[1/3735] Sequential number within the clustermeta.id;meta.mainintRAJ2000[4/20] Hour of Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[43/60] Degree of Declination (J2000)pos.eq.dec;meta.mainVmag[9.95/22.3] Apparent Johnson V magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.001/0.6]? rms uncertainty on Vmagmagstat.error;phot.magfloatnullableU-B[-4.86/2.11]? Johnson U-B color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B[0.001/0.3]? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.UfloatnullableB-V[-1.19/4.41]? Johnson B-V color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V[0.001/0.8]? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.BfloatnullableGmag[9.34/21.7]? Apparent Gaia EDR3 G magnitudemagphot.mag;em.opt.Vfloatnullablee_Gmag[0.003/0.09]? rms uncertainty on Gmagmagstat.error;phot.magfloatnullableBP-RP[-0.42/4.46]? Gaia EDR3 BP-RP color indexmagphot.color;em.opt.B;em.opt.Rfloatnullablee_BP-RP[0.005/0.8]? rms uncertainty on BP-RPmagstat.errorfloatnullablepmRA[-76.1/105]? Gaia EDR3 proper motion component; pmRA*cosDEmas/yrpos.pm;pos.eq.radoublenullablee_pmRA[0.01/3]? rms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-58.6/109]? Gaia EDR3 proper motion componentmas/yrpos.pm;pos.eq.decdoublenullablee_pmDE[0.01/2]? rms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableplx[-7.95/16.5]? Gaia EDR3 trigonometric parallaxmaspos.parallax.trigfloatnullablee_plx[0.009/2]? rms uncertainty on plxmasstat.error;pos.parallaxfloatnullablePmemb[0/1]? Membership probabilitystat.probabilityfloatnullable