J/MNRAS/419/2379ivo://CDS.VizieR/J/MNRAS/419/2379doi:10.26093/cds/vizier.74192379CDSJoshi Y.C.Joshi S.Kumar B.Mondal S.Balona L.A.2024-07-16T20:12:19Z2014-12-17T09:45:01ZCDS support team

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

cds-question@unistra.fropen-star-clustersvariable-starsinfrared-photometryvisible-astronomybroad-band-photometryWe present results of a variability search in the intermediate-age open cluster NGC 6866 from 29 nights over two observing seasons. We find 28 periodic variables, of which 19 are newly identified. The periods of these variables, which have V magnitudes from 11.5 to 19.3mag, range from ~48min to 37d. We detected several {delta} Scuti stars, some of which are of high amplitude, as well as {gamma} Doradus and rotational variables, and eclipsing binaries. In order to study the physical properties of the cluster, we obtained UBVRI photometry of all the stars on a good photometric night. The radial distribution of the stellar surface density shows that the cluster has a radial extent of about 7-arcmin ( ~3pc) with a peak density of 5.7+/-0.7stars/arcmin^2^ at the cluster centre. The colour-colour diagram indicates a reddening of E(B-V)=0.10mag towards NGC 6866. A distance of ~1.47kpc and an age of ~630Myr are estimated from the colour-magnitude diagram using the theoretical isochrones of solar metallicity.2012MNRAS.419.2379Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/419/2379CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/437/804 : UBVRI photometry of NGC559 stars (Joshi+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/419/2379https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/419/2379http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/419/2379https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/419/2379https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/419/2379http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/419/2379GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/419/2379/table1 (UBVRI photometric catalogue of 2473 stars detected in the field of cluster NGC 6866)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/419/2379/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/419/2379/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/419/2379/table1?GETtext/xml+votable180.050000true301.02587544.08194440.0055555555555555566/14749 14751 14792 147942.367228618189496e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/419/2379?format=asciiOpticalInfrareddefaultJ/MNRAS/419/2379/table1UBVRI photometric catalogue of 2473 stars detected in the field of cluster NGC 6866ID[1/2473] Sequential ID numbermeta.id;meta.mainintprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainUmag? Johnson U magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? rms uncertainty on Umag (1)magstat.error;phot.mag;em.opt.UfloatnullableBmagJohnson B magnitudemagphot.mag;em.opt.Bfloate_Bmagrms uncertainty on Bmag (1)magstat.error;phot.mag;em.opt.BfloatVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmag (1)magstat.error;phot.mag;em.opt.VfloatRmag? Cousins R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? rms uncertainty on Rmag (1)magstat.error;phot.mag;em.opt.RfloatnullableImag? Cousins I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imag (1)magstat.error;phot.mag;em.opt.IfloatnullableMsp[0/1] Membership probability based on the spatial distributionstat.probabilityfloatMph[0/1] Membership probability based on the position in the color-magnitude diagram (CMD)stat.probabilityfloatMpm[0/1]? Membership probability based on the proper motionmeta.code.memberfloatnullableLC[*] * indicates individual V and I light curves in subdirectory lcmeta.codecharVdataList the V-band datameta.ref.urlcharIdataList the I-band datameta.ref.urlchar