J/AJ/152/40ivo://CDS.VizieR/J/AJ/152/40doi:10.26093/cds/vizier.51520040CDSGullikson K.Kraus A.Dodson-Robinson S.2017-12-22T05:33:23Z2016-09-15T14:54:32ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsearly-type-starsa-starsspectroscopystellar-masseseffective-temperaturestellar-agesmetallicityinfrared-photometryBinary stars and higher-order multiple systems are a ubiquitous outcome of star formation, especially as the system mass increases. The companion mass-ratio distribution is a unique probe into the conditions of the collapsing cloud core and circumstellar disk(s) of the binary fragments. Inside a~1000AU the disks from the two forming stars can interact, and additionally companions can form directly through disk fragmentation. We should, therefore, expect the mass-ratio distribution of close companions (a<~100AU) to differ from that of wide companions. This prediction is difficult to test using traditional methods, in particular, with intermediate-mass primary stars, for a variety of observational reasons. We present the results of a survey searching for companions to A- and B-type stars using the direct spectral detection method, which is sensitive to late-type companions within ~1'' of the primary and which has no inner working angle. We estimate the temperatures and surface gravity of most of the 341 sample stars and derive their masses and ages. We additionally estimate the temperatures and masses of the 64 companions we find, 23 of which are new detections. We find that the mass-ratio distribution for our sample has a maximum near q~0.3. Our mass-ratio distribution has a very different form than in previous works, where it is usually well-described by a power law, and indicates that close companions to intermediate-mass stars experience significantly different accretion histories or formation mechanisms than wide companions.2016AJ....152...40Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/ApJ/804/146 : Atmospheric parameters for nearby B-F stars (David+, 2015)J/MNRAS/437/1216 : VAST Survey. A-type stars multiplicity (De Rosa+, 2014)J/A+A/537/A120 : Rotational velocities of A-type stars. IV. (Zorec+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/40https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/40/table1 (Sample properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/40/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/40/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/40/table1?GETtext/xml+votable180.050000true2.50916666711.1458138890.0055555555555555566/111 116 235 236 429 496 592 618 630 666 826 903 1020 1038 1069 1121 1227 1384 1454 1720 1754 1770 1955 1967 2317 2460 2697 2774 2903 2939 2947 2970 3132 3137 3144 3184 3377 3681 3784 3793 3892 4018 4224 4641 4655 4824 5059 5137 5149 5223 5267 5336 5345 5450 5762 6204 6211 6464 6646 6739 7205 7239 7865 8354 8474 8496 8571 8597 8687 9081 9105 9458 9521 9642 9702 10067 10202 10317 10660 11120 11548 11678 11817 11837 12491 12821 12848 12865 12965 13025 13127 13187 13454 13507 13682 13688 13690 13723 13915 13953 13969 14126 14167 14218 14427 14472 14653 14666 14728 14763 14843 14878 15167 15179 15383 15438 15708 15782 15881 15938 16234 16240 16543 16686 16974 16990 17194 17254 17322 17421 17783 18560 18737 18942 18952 19309 19386 19525 19567 19825 19827 20047 20535 20546 20551 20725 20991 21004 21139 21165 21189 21234 21241 21271 21272 21362 21399 21430 21538 21788 21840 22104 22151 22160 22285 22444 22513 22615 22759 22824 22862 22910 22938 22994 23005 23064 23102 23115 23281 23375 23411 23451 23463 23493 23518 23557 23978 24085 24087 24093 24107 24278 24400 24796 25414 25487 25950 26014 26024 26033 26078 26145 26276 26378 26867 27029 27102 27322 27506 27699 27794 27863 27930 28062 28150 28394 28912 28944 29149 29582 29630 29809 30229 30328 30419 30448 30655 30697 30851 30897 31078 31121 31281 31399 31491 31507 31600 31614 31664 31745 31776 31862 32087 32094 32106 32133 32145 32364 32542 32590 32720 33111 33417 34054 34257 34456 35327 35999 36177 36240 36575 36804 36850 37231 37497 37649 37746 37764 38434 38561 38929 39187 39314 39373 39402 39674 39685 39696 39876 40124 40239 40599 40606 41947 41964 41973 42010 42428 42560 42623 42687 42719 42883 42932 42959 43011 43097 43183 43233 43238 43336 43383 43521 43539 43985 44075 44088 44119 44256 44264 44305 44312 44313 44366 44389 45374 45505 46084 46800 46845 47353 47775 47820 48021 48203 48546 48636 48709 48749 48900https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/40?format=asciiOpticalInfrareddefaultJ/AJ/152/40/table1Sample propertiesNameStar namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPCrossmatch with HIP catalogs within 1.5''meta.ref.urlcharNspNumber of spectroscopic observations (table2)meta.numberintnullableimgindicates imaging data (table3)meta.ref.urlcharCompindicates a detected companion (table4)meta.ref.urlcharSpTSpectral type (1)src.spTypecharRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmag[2/6]? The V-band magnitude (1)magphot.mag;em.opt.Vfloatnullableplx[0.72/68.92]? Parallax (1)maspos.parallax.trigfloatnullableTeff[7594/26000]? Stellar effective temperature (2)Kphys.temperature.effectiveintnullablee_Teff[258/2000]? Uncertainty in TeffKstat.error;phys.temperature.effectiveintnullablelogg[2.7/4.5]? Log surface gravity (2)log(cm.s**-2)phys.gravityfloatnullablee_logg[0.14/0.25]? Uncertainty in logglog(cm.s**-2)stat.errorfloatnullableMass[1.6/9.6]? Mass (2)solMassphys.massfloatnullableE_Mass[0.06/0.77]? Upper uncertainty in MasssolMassstat.error;stat.maxfloatnullablee_Mass[0.06/0.72]? Lower uncertainty in MasssolMassstat.error;phys.massfloatnullableAge[5/1064]? Age (2)Myrtime.ageintnullableE_Age[3/807]? Upper uncertainty in AgeMyrstat.error;stat.maxintnullablee_Age[1/412]? Low uncertainty in AgeMyrstat.error;time.ageintnullabler_Age[1/2]? Reference for Teff, logg, Mass, and Age (1, or 2=this study) (3)meta.ref;pos.frameintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/152/40/table3*NIRI observation logExpExposure sequencetime.expocharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharNspNumber of spectroscopic observations (table2)meta.numberintnullableCompindicates a detected companion (table4)meta.ref.urlcharKmag[4.4/6.5] The K band magnitudemagphot.mag;em.IR.Kfloatf_KmagSource of K magnitude (S=SIMBAD, or T=estimated from the spectral type of the star and its V-band magnitude)meta.codecharDateGemini/NIRI observation date (1)time.epoch;obsnullableSep[0.16/3.68]? Separation {rho}arcsecpos.angDistancefloatnullablee_Sep[0.0007/0.003]? Uncertainty in Separcsecstat.errorfloatnullablePA[14.1/346.8]? Position angle {theta}degpos.posAngfloatnullablee_PA[0.02/0.92]? Uncertainty in PAdegstat.errorfloatnullabledKcmag[1.77/3.9]? The {Delta} K-continuum band magnitude (2)magphot.magfloatnullablee_dKcmag[0.01/0.4]? Uncertainty in dKcmagmagstat.error;phot.magfloatnullableMass2[0.7/1.5]? Mass of secondarysolMassphys.massfloatnullableE_Mass2[0.14/0.39]? Upper uncertainty in Mass2solMassstat.error;stat.maxfloatnullablee_Mass2[0.1/0.28]? Lower uncertainty in Mass2solMassstat.errorfloatnullablea[25.1/467.7]? Separation, in astronomical unitsAUpos.distance;src.orbitalfloatnullablee_a[0.16/0.81]? Uncertainty in aAUstat.errorfloatnullableJ/AJ/152/40/table4Companion detectionsNameStar Namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompComponent (AB, AB?, AC, Aa,Ab, or Ba,Bb)meta.code.multipcharf_Comp[d] Newly discovered companion (d=true)meta.codecharNspNumber of spectroscopic observations (table2)meta.numberintnullableNimgNumber of imaging data (table3)meta.numberintnullablePindicates some properties (table1)meta.ref.urlcharNobs[1/3] Number of observations (1, 2, or 3)meta.numberintUsedUsed in analysis (yes or no)meta.codecharTeff[3647/16000] Companion surface effective temperatureKphys.temperature.effectiveinte_Teff[85/1000] Uncertainty in TeffKstat.error;phys.temperature.effectiveintvsini[1/120] Companion projected rotational velocitykm/sphys.veloc.rotatint[Fe/H][-0.5/0.5] Companion metallicityphys.abund.ZfloatMassI[0.5/4.3] Companion mass from isochronessolMassphys.massfloatE_MassI[0.02/0.47] Upper uncertainty in MassIsolMassstat.error;stat.maxfloate_MassI[0.02/0.43] Lower uncertainty in MassIsolMassstat.errorfloatMassS[0.5/4.7] Companion mass from Spectral typesolMassphys.massfloatE_MassS[0.01/0.76] Upper uncertainty in MassSsolMassstat.error;stat.maxfloate_MassS[0.01/0.67] Lower uncertainty in MassSsolMassstat.errorfloatJ/AJ/152/40/table2Spectroscopic observation logNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNimgNumber of imaging data (table3)meta.numberintnullableCompindicates a detected companion (table4)meta.ref.urlcharJD[6298.78/7288.82] Julian Date (JD-2450000)dtime.epochfloatInstSpectroscopic instrument used (1)instr.setupcharExp[22/7386] Exposure timestime.duration;obs.exposureintS/N[20/2520] Spectroscopic signal to noise per pixel (2)pos.parallax.spect;instr.pixelint