J/AJ/161/190ivo://CDS.VizieR/J/AJ/161/190doi:10.26093/cds/vizier.51610190CDSGeller A.M.Mathieu R.D.Latham D.W.Pollack M.Torres G.Leiner E.M.2023-06-13T06:23:13Z2021-07-28T11:46:21ZCDS support team

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

cds-question@unistra.fropen-star-clustersmultiple-starsradial-velocityvisible-astronomyspectroscopyastronomical-object-identificationWe present and analyze 120 spectroscopic binary and triple cluster members of the old (4Gyr) open cluster M67 (NGC2682). As a cornerstone of stellar astrophysics, M67 is a key cluster in the WIYN Open Cluster Study (WOCS); radial-velocity (RV) observations of M67 are ongoing and extend back over 45yr, incorporating data from seven different telescopes, and allowing us to detect binaries with orbital periods <~10^4^days. Our sample contains 1296 stars (604 cluster members) with magnitudes of 10<~V<~16.5 (about 1.3-0.7M{sun}), from the giants down to ~4mag below the main-sequence turnoff, and extends in radius to 30' (7.4pc at a distance of 850pc, or ~7 core radii). This paper focuses primarily on the main-sequence binaries, but orbital solutions are also presented for red giants, yellow giants, and sub-subgiants. Out to our period detection limit and within our magnitude and spatial domain, we find a global main-sequence incompleteness-corrected binary fraction of 34%{+/-}3%, which rises to 70%{+/-}17% in the cluster center. We derive a tidal circularization period of P_circ_=11.0_-1.0_^+1.1^days. We also analyze the incompleteness-corrected distributions of binary orbital elements and masses. The period distribution rises toward longer periods. The eccentricity distribution, beyond P_circ_, is consistent with a uniform distribution. The mass-ratio distribution is also consistent with a uniform distribution. Overall, these M67 binaries are closely consistent with similar binaries in the galactic field, as well as with the old (7Gyr) open cluster NGC188WOCS83.2021AJ....161..190Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/190CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/135/2264 : Stellar radial velocities in NGC 188 (Geller+, 2008)J/AJ/137/3743 : Spectroscopic binary orbits in NGC 188 (Geller+, 2009)J/AJ/138/159 : NGC6819 stellar radial-velocity and photometry (Hole+, 2009)J/AJ/139/1383 : Radial velocities in M35 (NGC 2168) (Geller+, 2010)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/AJ/150/10 : WOCS. LXVI. Radial velocity survey in M35 (Leiner+, 2015)J/AJ/150/97 : Radial velocities in M67.I. 1278 candidate memb. (Geller+,2015)J/AJ/160/169 : WOCS LXXXII. Orbital parameters & RVs in NGC 7789 (Nine+, 2020)J/MNRAS/503/236 : UVIT catalog & membership of 6 open clusters (Jadhav+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/190https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/190http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/190https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/190https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/190http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/190GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/190/table1 (Radial-Velocity data table)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/190/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/190/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/190/table1?GETtext/xml+votable180.050000true132.845458311.81372220.005555555555555556Cone search capability for table J/AJ/161/190/table2 (Orbital parameters for M67 single-lined binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/190/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/190/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/190/table2?GETtext/xml+votable180.050000true132.874607511.78801970.005555555555555556Cone search capability for table J/AJ/161/190/table3 (Orbital parameters for M67 double-lined binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/190/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/190/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/190/table3?GETtext/xml+votable180.050000true132.845475611.81373330.0055555555555555566/4253 4255 4277 4296 4298 4320https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/190?format=asciiOpticaldefaultJ/AJ/161/190/table1Radial-Velocity data tablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCSWOCS identifiermeta.id;meta.maincharXIDCross-match identifier (1)meta.idcharRAJ2000[08] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000[11/12] Degree of Declination (J2000)pos.eq.dec;meta.mainHJD[40951/58900] Heliocentric Julian Date HJD-2400000dtime.epochdoubleindexedTelTelescope and intrument pair code (2)meta.codecharRVel1[-151/222]? Primary heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableRVel2[-53.9/131]? Secondary heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableRVel3[25.8/33.9]? Tertiary heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_RVel1[0.05/10]? Uncertainty in RV1 (3)km/sstat.errorfloatnullableHeight[0.4/1.1]? Primary cross-correlation peak height (4)stat.fit.paramfloatnullableO-C1[-10.1/13]? Primary orbital solution residualkm/sstat.fit.residualfloatnullableO-C2[-14.7/22.2]? Secondary orbital solution residualkm/sstat.fit.residualfloatnullableO-C1o[-11.1/10.3]? Outer orbit primary orbital solution residualkm/sstat.fit.residualfloatnullableO-C2o[-5.34/5.24]? Outer orbit secondary orbital solution residualkm/sstat.fit.residualfloatnullablePhase[0.0003/1]? Orbital phasetime.phasefloatnullablePhaseo[0.02/0.98]? Outer orbit orbital phasetime.phasefloatnullablesignlel>0 indicate a single-lined binaries (table2)meta.numberintnullabledoublel>0 indicate a double-lined binaries (table3)meta.numberintnullableJ/AJ/161/190/table2Orbital parameters for M67 single-lined binariese_Per[0.000001/800] Uncertainty in Pdstat.errordoubleNCyc[0.8/5224] Number of orbital cycles coveredmeta.numberfloatgamma[32.2/35.7] Center-of-mass radial velocity of binarykm/sphys.veloc;pos.heliocentricfloate_gamma[0.05/1.4] Uncertainty in gammakm/sstat.errorfloatK[0.98/68.3] Radial velocity semi-amplitudekm/sspect.dopplerVelocfloate_K[0.07/4] Uncertainty in Kkm/sstat.errorfloate_e[0.003/0.14] Uncertainty in estat.errorfloatomega[14/360] Longitude of periastrondegsrc.orbital.periastronfloate_omega[0.9/140] Uncertainty in omegadegstat.errorfloatT0[45539/57823] Julian date of periastron nearest to average date of observationsdsrc.orbital.periastrondoublee_T0[0.05/600] Uncertainty in T0dstat.errorfloatasini[0.25/1492] Projected semi-major axis1e+06kmphys.size.smajAxisdoubleNRVel[12/111] Number of RVel measurementsmeta.numberintWOCSWOCS identifiermeta.id;meta.maincharSimbadSimbad column added by the CDSmeta.ref.urlchare[0.004/0.89] Eccentricitysrc.orbital.eccentricityfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXIDCross-match identifier (1)meta.idcharPer[2.66/14800] Orbital perioddtime.perioddoublee_asini[0.007/190] Uncertainty in asini1e+06kmstat.errorfloatfmass[6.30e-5/6.20e-1] Mass functionsolMassphys.massdoublee_fmass[0.50e-5/0.70e-1] Uncertainty in fmasssolMassstat.errordoubleRMS[0.29/3.17] RMS of orbital solution velocity residualskm/sstat.fit.residual;phys.veloc.orbitalfloatRVelInteractive Plotmeta.ref.urlchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainJ/AJ/161/190/table3Orbital parameters for M67 double-lined binariesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPer[1.36/1047] Orbital perioddtime.perioddoublee_Per[0.000005/1.8] Uncertainty in Pdstat.errordoubleNCyc[6.9/3495] Number of orbital cycles coveredmeta.numberfloatgamma[32.7/35] Center-of-mass radial velocity of binarykm/sphys.veloc;pos.heliocentricfloate_gamma[0.04/0.6] Uncertainty in gammakm/sstat.errorfloatK1[13.4/73.6] Primary radial velocity semi-amplitudekm/sspect.dopplerVelocfloate_K1[0.07/1.2] Uncertainty in K1km/sstat.errorfloatK2[13.1/85.5] Secondary radial velocity semi-amplitudekm/sspect.dopplerVelocfloate_K2[0.15/2.4] Uncertainty in K2km/sstat.errorfloate[0.001/0.74] Eccentricitysrc.orbital.eccentricityfloate_e[0.002/0.03] Uncertainty in estat.errorfloatomega[30/352] Longitude of periastrondegsrc.orbital.periastronfloate_omega[0.6/200] Uncertainty in omegadegstat.errorfloatT0[46102/57436] Julian date of periastron nearest to average date of observationsdsrc.orbital.periastrondoublee_T0[0.03/9] Uncertainty in T0dstat.errorfloatasini1[0.47/182] Projected primary semi-major axis1e+06kmphys.angSize.smajAxis;src.orbitalfloate_asini1[0.006/5] Uncertainty in asini11e+06kmstat.errorfloatasini2[0.56/177] Projected secondary semi-major axis1e+06kmphys.angSize.smajAxis;src.orbitalfloate_asini2[0.01/5] Uncertainty in asini21e+06kmstat.errorfloatmsin3i1[0.01/1.22] Projected primary masssolMassphys.massfloate_msin3i1[0.0007/0.2] Uncertainty in msin3(i)1solMassstat.errorfloatmsin3i2[0.01/0.99] Projected secondary masssolMassphys.massfloate_msin3i2[0.0005/0.09] Uncertainty in msin3(i)2solMassstat.errorfloatq[0.61/1.03] Mass ratio; secondary/primaryphys.massfloate_q[0.005/0.05] Uncertainty in qstat.errorfloatsigma1[0.21/4.46] RMS of primary orbital solution velocity residualskm/sstat.fit.residual;phys.veloc.orbitalfloatsigma2[0.5/8.55] RMS of secondary orbital solution velocity residualskm/sstat.fit.residual;phys.veloc.orbitalfloatNRVel1[12/52] Number of primary RVel measurementsmeta.numberintNRVel2[7/52] Number of secondary RVel measurementsmeta.numberintRVelInteractive Plotmeta.ref.urlchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainWOCSWOCS identifiermeta.id;meta.maincharXIDCross-match identifier (1)meta.idchar