J/AJ/151/66ivo://CDS.VizieR/J/AJ/151/66doi:10.26093/cds/vizier.51510066CDSBrewer L.N.Sandquist E.L.Mathieu R.D.Milliman K.Geller A.M.,Jeffries M.W.JROrosz J.A.Brogaard K.Platais I.Bruntt H.,Grundahl F.Stello D.Frandsen S.2017-10-03T05:12:49Z2016-07-21T13:17:29ZCDS support team

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

cds-question@unistra.fropen-star-clusterseclipsing-binary-starsspectroscopyradial-velocityAs part of our study of the old (~2.5Gyr) open cluster NGC 6819 in the Kepler field, we present photometric (Kepler and ground-based BVR_C_I_C_) and spectroscopic observations of the detached eclipsing binary WOCS 24009 (Auner 665; KIC5023948) with a short orbital period of 3.6 days. WOCS 24009 is a triple-lined system, and we verify that the brightest star is physically orbiting the eclipsing binary using radial velocities and eclipse timing variations. The eclipsing binary components have masses M_B_=1.090+/-0.010M_{sun}_ and M_C_=1.075+/-0.013M_{sun}_, and radii R_B_=1.099+/-0.006+/-0.005R_{sun}_and R_C_=1.069+/-0.006+/-0.013R_{sun}_. The bright non-eclipsing star resides at the cluster turnoff, and ultimately its mass will directly constrain the turnoff mass: our preliminary determination is M_A_=1.251+/-0.057M_{sun}_. A careful examination of the light curves indicates that the fainter star in the eclipsing binary undergoes a very brief period of total eclipse, which enables us to precisely decompose the light of the three stars and place them in the color-magnitude diagram (CMD). We also present improved analysis of two previously discussed detached eclipsing stars in NGC6819 (WOCS40007 and WOCS23009) en route to a combined determination of the cluster's distance modulus (m-M)_V_=12.38+/-0.04. Because this paper significantly increases the number of measured stars in the cluster, we can better constrain the age of the CMD to be 2.21+/-0.10+/-0.20Gyr. Additionally, using all measured eclipsing binary star masses and radii, we constrain the age to 2.38+/-0.05+/-0.22Gyr. The quoted uncertainties are estimates of measurement and systematic uncertainties (due to model physics differences and metal content), respectively.2016AJ....151...66Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/66CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/149/121 : WOCS. LXV. Abundances in NGC 6819 (Lee-Brown+, 2015)J/AJ/148/51 : WOCS. LXI. NGC 6819 photometry (Anthony-Twarog+, 2014)J/AJ/148/38 : WOCS. LX. RV survey of NGC 6819 (Milliman+, 2014)J/AJ/146/58 : Eclipse timings for NGC 6819-259 (Jeffries+, 2013)J/AJ/146/43 : WOCS. LV. NGC 6819 (Platais+, 2013)J/ApJ/729/L10 : KIC stars properties in NGC 6791 and NGC 6819 (Basu+, 2011)J/AJ/138/159 : NGC 6819 stellar radial-velocity and photometry (Hole+, 2009)J/MNRAS/358/795 : Variable stars in NGC 6819 field (Street+, 2005)J/AJ/121/327 : Metal Abundances of Red Clump Stars in NGC6819https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/66https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/66https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/66http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/151/66/table3 (Measured parameters for stars in NGC6819)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/66/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/66/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/66/table3?GETtext/xml+votable180.050000true295.320240.12432220.0055555555555555566/14752 14753 14754https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/151/66?format=asciiOpticaldefaultJ/AJ/151/66/table3Measured parameters for stars in NGC6819RVRadial velocities (table 2)meta.ref.urlcharm_WOCS[A-C] Component (A, B, or C)meta.code.multipcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCS[23009/40007] WIYN Open Cluster Study number (23009, 24009, or 40007)meta.id;meta.mainintOCatSimbad column added by the CDSmeta.ref.urlcharNeSimbad column added by the CDSmeta.numberintnullableVmag[15.1/17] The V band magnitude (1)magphot.mag;em.opt.VfloatB-V[0.58/0.75] The B-V color index (1)magphot.color;em.opt.B;em.opt.VfloatTeff[5855/6350]? Effective temperatureKphys.temperature.effectiveintnullableM/Msun[1/1.5]? The stellar mass to Sun mass ratio (M/M_{sun}_)phys.mass;arith.ratiofloatnullablee_M/Msun[0.007/0.06]? Error in M/M_{sun}_stat.errorfloatnullablef_M/Msun[b] Flag "b" indicates M/M_{sun}_ is based on a photometry-based extrapolation from other eclipsing stars in the clustermeta.codecharR/Rsun[1/2.2]? The stellar radius to Sun radius ratio (R/R_{sun}_)phys.size;arith.ratiofloatnullablee_R/Rsun[0.002/0.009]? Error in R/R_{sun}_stat.errorfloatnullableerr[0.005/0.013]? Second error in R/R_{sun}_stat.errorfloatnullablef_err[c] Flag on the two uncertainties (2)meta.codecharDM[12.3/12.4]? The cluster's distance modulus (m-M)_v_magphot.mag.distModfloatnullablee_DM[0.07/0.08]? Error in DMmagstat.errorfloatnullablePer[3/8333]? Period (from Table5)dtime.perioddoublenullablee_Per[0/30]? Error in Per (from Table5)dstat.errordoublenullableVP1Velocity Plot of WOCS 40007meta.ref.urlcharVP2Velocity Plot of the binary components of WOCS 24009meta.ref.urlcharVP3Velocity Plot of the bright third star WOCS 24009 Ameta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD database (declination part)degpos.eq.dec;meta.mainJ/AJ/151/66/table2Measured radial velocities from the WIYN 3.5m telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCS[24009/40007] WIYN Open Cluster Study number (24009 or 40007)meta.id;meta.mainintMJDModified Julian Date of observationdtime.epochdoubleRVA[-84.7/95.2] Radial velocity of A componentkm/sphys.veloc;pos.heliocentricfloate_RVA[0.02/1.8] Uncertainty in RVAkm/sstat.errorfloatRVB[-101.5/109.3]? Radial velocity of B componentkm/sphys.veloc;pos.heliocentricfloatnullablee_RVB[0.02/4.9]? Uncertainty in RVBkm/sstat.errorfloatnullableRVC[-91.5/88.7]? Radial velocity of C componentkm/sphys.veloc;pos.heliocentricfloatnullablee_RVC[0.3/9.5]? Uncertainty in RVCkm/sstat.errorfloatnullableJ/AJ/151/66/table4Eclipse timingsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCS[24009/40007] WIYN Open Cluster Study number (24009 or 40007)meta.id;meta.mainintBJDBarycentric Julian Datedtime.epochdoublee_BJDThe 1{sigma} uncertainty in BJDdstat.errordoubleType[PS] Eclipse type (P=primary or S=secondary)meta.codecharNoteTiming source note ("-Q#" indicates the beginning of Kepler Q#)meta.notechar