J/MNRAS/480/5099ivo://CDS.VizieR/J/MNRAS/480/5099doi:10.26093/cds/vizier.74805099CDSKuruwita R.L.Ireland M.Rizzuto A.Bento J.Federrath C.2024-08-18T20:21:30Z2022-06-29T13:24:19ZCDS support team

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

cds-question@unistra.frradial-velocityspectroscopic-binary-starspre-main-sequence-starsvisible-astronomyWe present observations of disc-bearing stars in Upper Scorpius (US) and Upper Centaurus-Lupus (UCL) with moderate resolution spectroscopy in order to determine the influence of multiplicity on disc persistence after ~5-20Myr. Discs were identified using infrared (IR) excess from the Wide-field Infrared Survey Explorer (WISE) survey. Our survey consists of 55 US members and 28 UCL members, using spatial and kinematic information to assign a probability of membership. Spectra are gathered from the ANU 2.3m telescope using the Wide Field Spectrograph (WiFeS) to detect radial velocity variations that indicate the presence of a companion. We identify two double-lined spectroscopic binaries, both of which have strong IR excess. We find the binary fraction of disc-bearing stars in US and UCL for periods up to 20yr to be 0.06^+0.07^_-0.02_ and 0.13^+0.06^_-0.03_, respectively. Based on the multiplicity of field stars, we obtain an expected binary fraction of ~0.12^+0.02^_-0.01_. The determined binary fractions for disc-bearing stars do not vary significantly from the field, suggesting that overall lifetime of discs may not differ between single and binary star systems.2018MNRAS.480.5099Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/480/5099CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/480/5099https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/480/5099http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/480/5099https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/480/5099https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/480/5099http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/480/5099GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/480/5099/table1 (RV standards used as templates to obtain radial velocities of our observed targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/480/5099/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/480/5099/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/480/5099/table1?GETtext/xml+votable180.050000true81.7777281-31.56617330.005555555555555556Cone search capability for table J/MNRAS/480/5099/tablea1 (Magnitudes of our targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/480/5099/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/480/5099/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/480/5099/tablea1?GETtext/xml+votable180.050000true208.648375-43.94669440.005555555555555556Cone search capability for table J/MNRAS/480/5099/tablea3 (Full list of objects observed in this survey with each epoch of data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/480/5099/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/480/5099/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/480/5099/tablea3?GETtext/xml+votable180.050000true208.648375-43.94669440.0055555555555555565/11077 6/16502 16603 17266 20641 20665 21953 22309 22626 22818 24713 25920 26183 27201 28955 30343 30721 30837 30848 30989 36813 40250 41770 41866 42218 42237 42239 42588 42598 42605-42606 42610-42611 42614 42625 42653 42675 42706 42714 42734 42749 42791 42798 42827 42858 42882 42885 42892 42906 42935 42956 42958-42959 42964 42968 42980-42982 42984 42991 42996 43002 43007 43315 43331 43358 43383 43399 43457 44076 44101 44262 44293 44317 44340 44354-44355 44358-44359 44362 44365 44370-44371 44376 44378 44385 44390 44397 44400 44402-44403 44495 44681 48705 48821 489558.157980699529898e-21 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/480/5099?format=asciiOpticaldefaultJ/MNRAS/480/5099/table1RV standards used as templates to obtain radial velocities of our observed targetsSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameRadial velocity standards ID (1)meta.id;meta.maincharSpTypeSpectral typesrc.spTypecharr_SpTypeReference on SpType (2)meta.ref;pos.framecharMassApproximate mass of the star (3)solMassphys.massfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatJ/MNRAS/480/5099/tablea1Magnitudes of our targetsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJmag2MASS J-band magnitudemagphot.mag;em.IR.JfloatKmag2MASS K-band magnitudemagphot.mag;em.IR.KfloatW4magWISE W4 (22um) band magnitudemagphot.flux.density;em.IR.15-30umfloatGmag? Gaia G-band magnitudemagphot.mag;em.optdoublenullableBPmag? Gaia BP-band magnitudemagphot.mag;em.opt.BdoublenullableRPmag? Gaia RP-band magnitudemagphot.mag;em.opt.RdoublenullableJ/MNRAS/480/5099/tablea3Full list of objects observed in this survey with each epoch of datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget namemeta.id;meta.maincharRegionRegion namemeta.id;obs.fieldcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpTypetempSpectral type of the preferred template used for each objectsrc.spTypecharMJDModified Julian Date JD-2400000.5dtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError on RVkm/sstat.errorfloatEWHaEquivalent width of H{alpha} line0.1nmspect.line.eqWidthfloat