J/AJ/162/285ivo://CDS.VizieR/J/AJ/162/285doi:10.26093/cds/vizier.51620285CDSLipartito I.Bailey Iii J.I.Brandt T.D.Mazin B.A.Mateo M.,Spencer M.E.Roederer I.U.2022-09-30T23:12:57Z2022-03-23T12:23:52ZCDS support team

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

cds-question@unistra.fropen-star-clustersmultiple-starsvisible-astronomyspectroscopyradial-velocityWe present orbits for 24 binaries in the field of open cluster NGC2516 (~150Myr) and 13 binaries in the field of open cluster NGC2422 (~130Myr) using results from a multiyear radial-velocity (RV) survey of the cluster cores. Six of these systems are double-lined spectroscopic binaries. We fit these RV variable systems with orvara, a MCMC-based fitting program that models Keplerian orbits. We use precise stellar parallaxes and proper motions from Gaia EDR3 to determine cluster membership. We impose a barycentric RV prior on all cluster members; this significantly improves our orbital constraints. Two of our systems have periods between five and 15 days, the critical window in which tides efficiently damp orbital eccentricity. These binaries should be included in future analyses of circularization across similarly-aged clusters. We also find a relatively flat distribution of binary mass ratios, consistent with previous work. With the inclusion of TESS light curves for all available targets, we identity target 378-036252 as a new eclipsing binary. We also identify a field star whose secondary has a mass in the brown dwarf range, as well as two cluster members whose RVs suggest the presence of an additional companion. Our orbital fits will help constrain the binary fraction and binary properties across stellar age and across stellar environment.2021AJ....162..285Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/285CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)J/A+A/558/A53 : Milky Way global survey star clusters. II. (Kharchenko+, 2013)J/AJ/148/83 : Spectroscopy in NGC 2360, NGC 3680, and NGC 5822 (Sales+, 2014)J/AJ/150/16 : Speckle-interferometry in Melotte 111 (Guerrero+, 2015)J/ApJ/821/8 : Spectro. binary population of ONC and NGC2264 (Kounkel+, 2016)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diagrams (Gaia Collaboration, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/AJ/156/18 : APOGEE DR14:Binary comp. of evolved stars (Price-Whelan+, 2018)J/MNRAS/475/1609 : RV variability in NGC 2516 and NGC 2422 (Bailey+, 2018)J/AJ/157/196 : Close companions around young stars (Kounkel+, 2019)J/A+A/641/A51 : NGC 2516 membership list (Fritzewski+, 2020)J/AJ/159/199 : OCCAM IV. Open cluster abundances APOGEE DR16 (Donor+, 2020)J/AJ/160/169 : WOCS. LXXXII. Orbital parameters & RVs in NGC7789 (Nine+, 2020)J/ApJ/903/55 : APOGEE parameters through 83 open clusters (Poovelil+, 2020)J/AJ/161/190 : Radial Velocities of binary population in M67 (Geller+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/162/285https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/162/285http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/162/285https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/162/285https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/162/285http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/162/285GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/162/285/binBinary solutionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster fieldmeta.id.parentcharIDTarget IDmeta.id;meta.maincharMemMember/ Non-Membermeta.notecharvsiniLine-of-sight stellar rotational velocitykm/sphys.veloc.rotatdoublee_vsiniUncertainty in vsinikm/sstat.error;phys.veloc.rotatdoublePer? Period, median fit valuedtime.period;stat.mediandoublenullablee_Per? Lower uncertainty on Perdstat.errordoublenullableE_Per? Upper uncertainty on Perdstat.error;stat.maxdoublenullablee? Eccentricity, median fit valuesrc.orbital.eccentricity;stat.mediandoublenullablee_e? Lower uncertainty on eccstat.errordoublenullableE_e? Upper uncertainty on eccstat.error;stat.maxdoublenullablelambda? mean anomaly at a reference epochsrc.orbital.meanAnomalydoublenullablee_lambda? Lower uncertainty on lambdastat.errordoublenullableE_lambda? Upper uncertainty on lambdastat.error;stat.maxdoublenullableomega? argument of periastron, median fit valuesrc.orbital.periastron;stat.mediandoublenullablee_omega? Lower uncertainty on omegastat.errordoublenullableE_omega? Upper uncertainty on omegastat.error;stat.maxdoublenullableK? RV semi-amplitude, median fit valuekm/ssrc.var.amplitude;stat.mediandoublenullablee_K? Lower uncertainty on Kkm/sstat.errordoublenullableE_K? Upper uncertainty on Kkm/sstat.error;stat.maxdoublenullableRVel? barycenter radial velocity, median fit valuekm/sphys.veloc;pos.heliocentricdoublenullablee_RVel? Lower uncertainty on RVelkm/sstat.error;spect.dopplerVelocdoublenullableE_RVel? Upper uncertainty on RVelkm/sstat.error;stat.maxdoublenullableMstar? Primary mass, solar unitssolMassmeta.unit;phys.massdoublenullableq? Mass ratio, Primary/Secondary massphys.massdoublenullablee_q? Lower uncertainty on qstat.errordoublenullableE_q? Upper uncertainty on qstat.error;stat.maxdoublenullablesigmachi? multiplicative constant (1)phot.calib;arith.zpdoublenullableMMMultimodal targets (2)meta.codecharJ/AJ/162/285/figa1Radial velocity time series used in our MCMC fitsIDTarget IDmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date at observation midpoint, photon weighted (1)dtime.epochdoubleRVel1? single stellar component best fit RVm/sphys.veloc;pos.heliocentricdoublenullablee_RVel1? Uncertainty in RVel1 (2)m/sstat.errordoublenullableRVel12? two component best fit RV, first componentm/sphys.veloc;pos.heliocentricdoublenullablee_RVel12? Uncertainty in RVel12 (2)m/sstat.errordoublenullableRVel22? two component best fit RV, second componentm/sphys.veloc;pos.heliocentricdoublenullablee_RVel22? Uncertainty in RVel22 (2)m/sstat.errordoublenullableNres? number of spectral resolution elements separating the two component spectrameta.numberdoublenullableeMULerror multiplier for each spectrumstat.errordouble