J/MNRAS/437/1216ivo://CDS.VizieR/J/MNRAS/437/1216doi:10.26093/cds/vizier.74371216CDSDe Rosa R.J.Patience J.Wilson P.A.Schneider A.Wiktorowicz S.J.,Vigan A.Marois C.Song I.Macintosh B.Graham J.R.Doyon R.,Bessell M.S.Thomas S.Lai O.2024-08-07T20:12:16Z2015-01-16T08:21:34ZCDS support team

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

cds-question@unistra.frmultiple-starsa-starsWith a combination of adaptive optics imaging and a multi-epoch common proper motion search, we have conducted a large volume-limited (D<=75pc) multiplicity survey of A-type stars, sensitive to companions beyond 30AU. The sample for the Volume-limited A-STar (VAST) survey consists of 435 A-type stars: 363 stars were observed with adaptive optics, 228 stars were searched for wide common proper motion companions and 156 stars were measured with both techniques. The projected separation coverage of the VAST survey extends from 30 to 45000AU. A total of 137 stellar companions were resolved, including 64 new detections from the VAST survey, and the companion star fraction, projected separation distribution and mass ratio distribution were measured. The separation distribution forms a log-normal distribution similar to the solar-type binary distribution, but with a peak shifted to a significantly wider value of 387^+132^_-98_AU. Integrating the fit to the distribution over the 30 to 10000AU observed range, the companion star fraction for A-type stars is estimated as 33.8+/-2.6%. The mass ratio distribution of closer (<125AU) binaries is distinct from that of wider systems, with a flat distribution for close systems and a distribution that tends towards smaller mass ratios for wider binaries. Combining this result with previous spectroscopic surveys of A-type stars gives an estimate of the total companion star fraction of 68.9+/-7.0%. The most complete assessment of higher order multiples was estimated from the 156 star subset of the VAST sample with both adaptive optics and common proper motion measurements, combined with a thorough literature search for companions, yielding a lower limit on the frequency of single, binary, triple, quadruple and quintuple A-type star systems of 56.4_-4.0_^+3.8^, 32.1_-3.5_^+3.9^, 9.0_-1.8_^+2.8^, 1.9_-0.6_^+1.8^ and 0.6_-0.2_^+1.4^ percent, respectively.2014MNRAS.437.1216Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/437/1216CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/422/2765 : A-star multiples orbital motion monitoring (De Rosa+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/437/1216https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/437/1216http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/437/1216https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/437/1216https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/437/1216http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/437/1216GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/437/1216/vast (VAST sample (table1 and 2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/437/1216/vast?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/437/1216/vast?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/437/1216/vast?GETtext/xml+votable180.050000true0.414416773.61184470.0055555555555555566/155 183 350-351 475 615 689 714 744 829 902 934 1033 1035 1337 1412 1468 1555 1680 1714 1792 1908 1923 1948 1973 2170 2296 2317 2340 2360 2409 2591 2676 2690 2771 2924 2949 3184 3211 3338 3586 3625 3678 3710 3715 3819 3849 3892 3920 4042 4224 4277 4338 4516 4641 4724 4924 4949 5060 5065-5066 5137 5311 5323 5373 5428 5450 5631 5717 5726 5762 5777 6008 6204 6442 6674 6777 6948 7138 7205 7221 7267 7332 7459 7762 7865 8008 8053 8156 8381 8496 8510 8534 8571 8597 8610 8690 8899 9048 9507 9521 9716 9969 9995 10000 10096 10317 10401 10459 10467 10486 10568 10613-10614 10626 10660 10695 10713 10741 10822 10834 10900 10923 11031 11085 11120 11193 11349 11589 11770 11817 11837 12144 12255 12277 12396 12467 12491 12548 12649 12695 12698 12821 12848 13127 13752 13969 14126 14144 14218 14224 14260 14359 14390 14405 14478 14640-14641 14687 14852 14899 14908 15019 15144 15179 15232 15330 15527 15535 15583 15621 15739 15940 15958 16020 16036 16240 16289 16543 16685-16686 17194 17398 17421 17608 17783 18034 18290 18423 18493 18527 18737 18797 18804 18952 19175 19314 19329 19610-19611 19825 20012 20047 20125 20184 20313 20658 21036 21189 21272 21289 21388 21430 21461-21462 21788 22050 22077 22151 22250 22434 22511 22581 22759 22773 22822 22849 22917 23261 23383 23392 23403 23405 23408 23426 23493 23502-23503 23514 23518 23523 23532 23537-23539 23547 23647 23655 23658 23826 23870 24137 24207 24221 24223 24796 24839 24989 25077 25096 25199 25414 25963 25973 26024 26078 26145 26381 26406 26677 26705 26728 26929 27027 27118 27163 27735 27756 27794 27816 27850 27863 27875 27887 27906 27909 28172 28197 28208 28285 28316 28326 28352 28396 28516-28517 28872 29021 29086 29155 29212 29311 29390 29428 29454 29572 29630 29719 30328 30467 30539 30580 30655 30914 30958 31078 31281 31284 31373 31391 31399 31412 31448 31491 31561 31776 31849 32061 32288 32466 32496 32536 32613 32688 33193 33547 33722 33976 34049 34054 34456 34680 34823 34875 34908 35352 35391 35440 35723 35836 36036 36081-36082 36351 36391 36711 36804 36850 37101 37312 37463 37700 37723 37816 38015 38223 39137 39611 39640 40035 40208 40578 40963 40984 41361 41397 41446 41565 41599 41759 41918 42047 42072 42434 42910 43004 43018 43469 43539-43540 43677 43809 43914 43969 44441 44494 44499 44785 44833 44897 45374 45676 45746 45819 45865 45983 46084 46096 46908 47031 47112 47595 47777 48037 48122 48417 48589 48591 48761 48900 48910 489638.650015785639275e-20 5.101838343667421e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/437/1216?format=asciidefaultJ/MNRAS/437/1216/vastVAST sample (table1 and 2 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP numbermeta.id;meta.mainintprimaryCCompanions identified or found in the literaturemeta.ref.urlintnullableSpTypeMK spectral typesrc.spTypecharDistDistancepcpos.distance;pos.heliocentricfloate_Distrms uncertainty on Distpcstat.errorfloatBTmagTycho BT magnitudemagphot.mag;em.opt.Bfloate_BTmagrms uncertainty on BTmagmagstat.error;phot.mag;em.opt.BfloatVTmagTycho VT magnitudemagphot.mag;em.opt.Vfloate_VTmagrms uncertainty on VTmagmagstat.error;phot.mag;em.opt.VfloatJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag2MASS Ks magnitudemagphot.mag;em.IR.Kfloate_Ksmagrms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatAgeStar estimated ageMyrtime.ageintr_AgeReference for Age estimate (1)meta.ref;pos.frameintMassStar masssolMassphys.massfloatbSCA? Lower value of separation coverage from Adapative Optices (2)log(AU)pos.angDistance;stat.minfloatnullableBSCA? Upper value of separation coverage from Adapative Optices (2)log(AU)pos.angDistance;stat.maxfloatnullablebSCC? Lower value of separation coverage from CPM search (2)log(AU)pos.angDistance;stat.minfloatnullableBSCC? Upper value of separation coverage from CPM search (2)log(AU)pos.angDistance;stat.maxfloatnullableNameNamemeta.idcharBayerBayer designationmeta.idFlamsteedFlamsteed designationmeta.idcharHR? HR numbermeta.idintnullableHDHD numbermeta.idintADSADS designationmeta.idcharWDSWDS designationmeta.idcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/MNRAS/437/1216/table6Binary companions identified within the AO observationsHIPHIP numbermeta.id;meta.mainintq[0/1] Mass ratio (M2/M1)phys.massfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompWDS designation of companionmeta.code.multipcharn_Comp[a-e, ] Remarks about the companion (1)meta.notecharrhoAngular separation {rho}arcsecpos.angDistancefloataproj[5/1125] Projected separationAUpos.angDistancefloattheta[0/360] Position angle {theta}degpos.posAngfloatn_Dm[KH] Band (filter) of {Delta}minstr.bandpasscharDmDifference in magnitude {Delta}m between the two componentsmagphot.magfloatM1Mass of the primarysolMassphys.massfloatM2Mass of the secondarysolMassphys.massfloatDateObservation datetime.epoch;obsnullableJ/MNRAS/437/1216/table7Binary companions identified within the astrometric searchqMass ratio (M2/M1)phys.massfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP numbermeta.id;meta.mainintCompCompanion designationmeta.code.multipcharMultWDS designation of multiplicity componentsmeta.code.multipcharn_Mult[a] newly resolved binary without a designation assigned in the WDS cataloguemeta.notecharrhoAngular separation {rho}arcsecpos.angDistancefloataproj[1133/43822] Projected separationAUpos.angDistancefloattheta[0/360] Position angle {theta}degpos.posAngfloatDKDifference in K magnitude between the two componentsmagphot.mag;arith.difffloatM1Mass of the primarysolMassphys.massfloatM2Mass of the secondarysolMassphys.massfloatJ/MNRAS/437/1216/table9Companions listed within the literature used in the calculation of the lower limit of the multiplicity fractionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP numbermeta.id;meta.mainintCompCompanion designationmeta.code.multipcharlogP? Orbital period (log scale)log(d)time.periodfloatnullablel_rhoLimit flag on rhometa.code.errorcharrho? Angular separation {rho}arcsecpos.angDistance;src.orbitaldoublenullableRefReferencemeta.ref;pos.framechar