J/AJ/155/109ivo://CDS.VizieR/J/AJ/155/109doi:10.26093/cds/vizier.51550109CDSSchaefer G.H.Prato L.Simon M.2019-11-11T22:00:00Z2018-10-30T07:51:42ZCDS support team

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

cds-question@unistra.frstar-forming-regionsstellar-associationsmultiple-starspre-main-sequence-starsstellar-distancestellar-spectral-typesinfrared-photometryWe present measurements of the orbital positions and flux ratios of 17 binary and triple systems in the Ophiuchus star-forming region and the Upper Centaurus-Lupus cluster based on adaptive optics imaging at the Keck Observatory. We report the detection of visual companions in MML 50 and MML 53 for the first time, as well as the possible detection of a third component in WSB 21. For six systems in our sample, our measurements provide a second orbital position following their initial discoveries over a decade ago. For eight systems with sufficient orbital coverage, we analyze the range of orbital solutions that fit the data. Ultimately, these observations will help provide the groundwork toward measuring precise masses for these pre-main-sequence stars and understanding the distribution of orbital parameters in young multiple systems.2018AJ....155..109Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)J/AJ/124/1670 : Post-T Tauri Stars in Sco-Cen Association (Mamajek+, 2002)J/ApJ/593/1093 : IC 348 membership (Luhman+, 2003)J/AJ/130/1733 : Optical spectroscopy of {rho} Oph stars (Wilking+, 2005)J/ApJ/630/381 : Mid-IR imaging in {rho} Oph (Barsony+, 2005)J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)J/ApJ/712/925 : Transition circumstellar disks in Ophiuchus (Cieza+, 2010)J/AJ/142/140 : Optical spectroscopy of {rho} Oph stars. II. (Erickson+, 2011)J/ApJ/813/83 : Multiple star formation in Ophiuchus (Cheetham+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/109https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/109/table1 (Observed Multiple Systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/109/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/109/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/109/table1?GETtext/xml+votable180.050000true222.60755833-35.11350.005555555555555556Cone search capability for table J/AJ/155/109/table2 (Log of Keck NIRC2 AO Observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/109/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/109/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/109/table2?GETtext/xml+votable180.050000true248.0491517-24.672680.0055555555555555566/42970 42980 42981 42983 42992 44069 44076https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/109?format=asciiInfrareddefaultJ/AJ/155/109/table1Observed Multiple SystemsONameOther object namemeta.idcharRegionRegion identifiermeta.id;obs.fieldcharSpTypeMK spectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainDist[130/147.3] Distancepcpos.distance;pos.heliocentricfloatr_DistReference for Dist (2)meta.ref;pos.framecharr_SpTypeReference for SpType (1)meta.ref;pos.framecharJ/AJ/155/109/table2Log of Keck NIRC2 AO ObservationsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateUT date of observationtime.epoch;obsnullableTimeUT time of observationtime.epochNameObject namemeta.id;meta.maincharONameOther object namemeta.idcharFilt1First filter usedmeta.code;instr.filtercharo_Filt1[3/30] Number of images taken in Filt1meta.numberintFilt2Second filter usedmeta.code;instr.filtercharo_Filt2[3/12]? Number of images taken in Filt2meta.numberintnullableFilt3Third filter usedmeta.code;instr.filtercharo_Filt3[6/12]? Number of images taken in Filt3meta.numberintnullableFilt4Fourth filter usedmeta.code;instr.filtercharo_Filt4[3/20]? Number of images taken in Filt4meta.numberintnullableAORate[50/750] Adaptive optics (AO) rateHzem.freqintTmin[0.18/4] Minimum integration time (1)stime.epoch;stat.minfloatTmax[0.5/2]? Maximum integration time (1)stime.epoch;stat.maxfloatnullablePSFPoint-spread function (PSF) used (ePSF="effective PSF")phys.luminosity.fun;instr.setupchar_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.mainJ/AJ/155/109/table3Keck NIRC2 Adaptive Optics Measurements of the Orbital Positions in Multiple SystemsNameObject namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintONameOther object namemeta.idcharm_NameComponent identification (1)meta.code.multipcharJYr[2003.2855/2015.5261] Julian yearyrtime.epochdoubleSep[21.47/5071.4]? Binary separationmaspos.angDistancefloatnullablee_Sep[0.12/10.28]? Error in Sepmasstat.errorfloatnullablePA[9.99/352.96]? Position angledegpos.posAngfloatnullablee_PA[0.025/5.8]? Error in PAdegstat.errorfloatnullableFiltFiltermeta.id;instr.filtercharFratio[0.0335/5.527] Flux ratio (f2/f1)phot.flux;arith.ratiofloate_Fratio[0.0009/0.532] Error in Fratiostat.errorfloatNoteCode for additional note (2)meta.notechar