J/A+A/632/A3ivo://CDS.VizieR/J/A+A/632/A3doi:10.26093/cds/vizier.36320003CDSGiesers B.KamannS.Dreizler S.Husser T.-O.Askar A.Goettgens F.,Brinchmann J.Latour M.Weilbacher P.M.Wendt M.Roth M.M.2022-02-09T07:38:27Z2019-11-21T15:00:51ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmultiple-starsradial-velocityWe utilize multi-epoch MUSE spectroscopy to study binaries in the core of NGC 3201. Our sample consists of 3553 stars with 54883 spectra in total comprising 3200 main-sequence stars up to 4 magnitudes below the turn-off. Each star in our sample has between 3 and 63 (with a median of 14) reliable radial velocity (RV) measurements within five years of observations. We introduce a statistical method to determine the probability of a star showing RV variations based on the whole inhomogeneous RV sample. Using HST photometry and an advanced dynamical MOCCA simulation of this specific GC we overcome observational biases that previous spectroscopic studies had to deal with. This allows us to infer a binary frequency in the MUSE FoV and enables us to deduce the underlying true binary frequency of (6.75+/-0.72)% in NGC 3201. The comparison of the MUSE observations with the MOCCA simulation suggests a significant fraction of primordial binaries. We can also confirm a radial increase of the binary fraction towards the GC centre due to mass segregation. We discovered that in our sample at least (57.5+/-7.9)% of blue straggler stars (BSS) are in a binary system. For the first time in a study of GCs, we were able to fit Keplerian orbits to a significant sample of 95 binaries. We present the binary system properties of eleven BSS and show evidence that two BSS formation scenarios, the mass transfer in binary (or triple) star systems and the coalescence due to binary-binary interactions, are present in our data. We also describe the binary and spectroscopic properties of four sub-subgiant (or red straggler) stars. Furthermore, we discovered two new black hole (BH) candidates with minimum masses (Msini) of (7.68+/-0.50)M_{sun}_, (4.4+/-2.8)M_{sun}_, and refine the minimum mass estimate on the already published BH to (4.53+/-0.21)M_{sun}_. These BHs are consistent with an extensive BH subsystem hosted by NGC 3201.2019A&A...632A...3Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/632/A3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/133/1658 : ACS survey of galactic globular clusters (Sarajedini+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/632/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/632/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/632/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/632/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/632/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/632/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/632/A3/list (List of stars with radial velocity measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/632/A3/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/632/A3/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/632/A3/list?GETtext/xml+votable180.050000true154.4004963-46.42667690.005555555555555556Cone search capability for table J/A+A/632/A3/tablea1r (Radial velocities of RR Lyr and SXP stars (for 13 stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/632/A3/tablea1r?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/632/A3/tablea1r?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/632/A3/tablea1r?GETtext/xml+votable180.050000true154.4004963-46.42667690.005555555555555556Cone search capability for table J/A+A/632/A3/tablea1m (Radial velocities of NGC 3201 members (for 3540 stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/632/A3/tablea1m?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/632/A3/tablea1m?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/632/A3/tablea1m?GETtext/xml+votable180.050000true154.4009113-46.42640940.005555555555555556Cone search capability for table J/A+A/632/A3/tablea1n (Radial velocities of NGC 3201 nonmembers (for 40 stars))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/632/A3/tablea1n?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/632/A3/tablea1n?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/632/A3/tablea1n?GETtext/xml+votable180.050000true154.4009126-46.42132650.005555555555555556Cone search capability for table J/A+A/632/A3/tablea2 (Orbital parameters of binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/632/A3/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/632/A3/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/632/A3/tablea2?GETtext/xml+votable180.050000true154.4000545-46.42013890.0055555555555555566/384652.76124552865182e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/632/A3?format=asciidefaultJ/A+A/632/A3/listList of stars with radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[rmn] Type of star (1)meta.codecharACSThe identifier in the NGC 3201 ACS cataloguemeta.id;meta.mainintRAJ2000Right ascension of star (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of star (J2000)degpos.eq.dec;meta.mainNobsNumber of observed radial velocities in corresponding table A1meta.numberintVCShow the Radial Velocity curvesmeta.ref.urlcharJ/A+A/632/A3/tablea1rRadial velocities of RR Lyr and SXP stars (for 13 stars)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACSThe identifier in the NGC 3201 ACS cataloguemeta.id;meta.mainintRAJ2000Right ascension of star (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of star (J2000)degpos.eq.dec;meta.mainF606WmagACS F606W magnitude of starmagphot.mag;em.opt.RfloatDateMean observation date of the combined exposures, BJD (Barycentric Julian Date)dtime.epoch;obs;stat.meandoubleBRVBarycentric corrected radial velocity of spectrumkm/sphys.veloc;pos.barycenterfloate_BRVRadial velocity uncertaintykm/sstat.errorfloatPvarProbability that star is a binarystat.fit.goodnessfloatJ/A+A/632/A3/tablea1mRadial velocities of NGC 3201 members (for 3540 stars)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACSThe identifier in the NGC 3201 ACS cataloguemeta.id;meta.mainintRAJ2000Right ascension of star (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination of star (J2000)degpos.eq.dec;meta.mainindexedF606WmagACS F606W magnitude of starmagphot.mag;em.opt.RfloatDateMean observation date of the combined exposures, BJD (Barycentric Julian Date)dtime.epoch;obs;stat.meandoubleindexedBRVBarycentric corrected radial velocity of spectrumkm/sphys.veloc;pos.barycenterfloate_BRVRadial velocity uncertaintykm/sstat.errorfloatPvarProbability that star is a binarystat.fit.goodnessfloatJ/A+A/632/A3/tablea1nRadial velocities of NGC 3201 nonmembers (for 40 stars)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACSThe identifier in the NGC 3201 ACS cataloguemeta.id;meta.mainintRAJ2000Right ascension of star (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of star (J2000)degpos.eq.dec;meta.mainF606WmagACS F606W magnitude of starmagphot.mag;em.opt.RfloatDateMean observation date of the combined exposures, BJD (Barycentric Julian Date)dtime.epoch;obs;stat.meandoubleBRVBarycentric corrected radial velocity of spectrumkm/sphys.veloc;pos.barycenterfloate_BRVRadial velocity uncertaintykm/sstat.errorfloatPvarProbability that star is a binarystat.fit.goodnessfloatJ/A+A/632/A3/tablea2Orbital parameters of binariese_AmpUncertainty of semi-amplitudekm/sstat.errorfloatMvisMass of visible componentsolMassphys.massfloate_MvisUncertainty of mass of visible componentsolMassstat.errorfloatMinvisMass of invisible componentsolMassphys.massfloate_MinvisUncertainty of mass of invisible componentsolMassstat.errorfloatComCommentsmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACSThe identifier in the NGC 3201 ACS cataloguemeta.id;meta.mainintRAJ2000Right ascension of star (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of star (J2000)degpos.eq.dec;meta.mainPerOrbital period of binary systemdtime.perioddoublee_PerUncertainty of perioddstat.errordoubleEccEccentricity of binary systemsrc.orbital.eccentricityfloate_EccUncertainty of eccentricitystat.errorfloatAmpSemi-amplitude of the visible componentkm/ssrc.var.amplitude;phys.velocfloat