J/A+A/568/A26ivo://CDS.VizieR/J/A+A/568/A26doi:10.26093/cds/vizier.35680026CDSElliott P.Bayo A.Melo C.H.F.Torres C.A.O.Sterzik G.R.Quast M.2017-12-15T10:55:23Z2014-08-08T16:30:13ZCDS support team

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

cds-question@unistra.fropen-star-clustersspectroscopic-binary-starspre-main-sequence-starsradial-velocityDynamically undisrupted, young populations of stars are crucial in studying the role of multiplicity in relation to star formation. Loose nearby associations provide us with a great sample of close (<150pc) pre-main sequence (PMS) stars across the very important age range (~5-70Myr) to conduct such research. We characterize the short period multiplicity fraction of the search for associations containing young stars (SACY) sample, accounting for any identifiable bias in our techniques and present the role of multiplicity fractions of the SACY sample in the context of star formation. Using the cross-correlation technique we identified double-lined and triple-lined spectroscopic systems (SB2/SB3s), in addition to this we computed radial velocity (RV) values for our subsample of SACY targets using several epochs of fiber-fed extended range optical spectrograph (FEROS) and ultraviolet and visual echelle spectrograph (UVES) data. These values were used to revise the membership of each association that was then combined with archival data to determine significant RV variations across different data epochs characteristic of multiplicity; single-lined multiple systems (SB1). Results: We identified seven new multiple systems (SB1s: 5, SB2s: 2). We find no significant difference between the short period multiplicity fraction (F_m_) of the SACY sample and that of close star-forming regions (~-2Myr) and the field (F_m_<=10%). These are seen both as a function of age and as a function of primary mass, M_1_, in the ranges P [1:200day] and M_2_ [0.08M_{sun}_-M_1_], respectively. Our results are consistent with the picture of universal star formation, when compared to the field and close star-forming regions (SFRs). We comment on the implications of the relationship between increasing multiplicity fraction with the primary mass within the close companion range in relation to star formation.2014A&A...568A..26Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/568/A26CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/105 : CORAVEL Radial Velocities of Southern Stars (Andersen+ 1985)III/249 : Stellar RV bibliographic catalog (Malaroda+, 2006)III/252 : Pulkovo RV for 35493 HIP stars (Gontcharov, 2006)III/272 : RAVE 4th data release (Kordopatis+, 2013)J/A+A/460/695 : SACY. I. (Torres+, 2006)J/A+A/508/833 : SACY. III. Li abundances (da Silva+, 2009)J/MNRAS/431/1005 : IC 2391 and Argus young stars (de Silva+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/568/A26https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/568/A26http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/568/A26https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/568/A26https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/568/A26http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/568/A26GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/568/A26/aver-rv (Radial velocities used in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A26/aver-rv?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A26/aver-rv?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A26/aver-rv?GETtext/xml+votable180.050000true16.609167-14.2963890.005555555555555556Cone search capability for table J/A+A/568/A26/sb2-rv (Component radial velocity values for SB2/SB3 systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A26/sb2-rv?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A26/sb2-rv?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A26/sb2-rv?GETtext/xml+votable180.050000true73.20625-19.9172220.005555555555555556Cone search capability for table J/A+A/568/A26/members (Membership list used in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A26/members?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A26/members?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A26/members?GETtext/xml+votable180.050000true82.185-65.4463890.0055555555555555566/46 102 129 601 765 826 940 1412 1762 1787 2374 3163 9331 10203 12436 12770 13450 13512 13674 13688 15372 15686 16393 16426 16543 16853 16930 17111 17274 17288 17552 18745 18797 19163 20125 20491-20492 20505 20507-20508 20510 20528 20564 20610 20618 20636-20637 20639 20645 20650 20657-20658 20706 21023 21050 21070 21080 21082-21083 21094 21118 21135 21139 21145 21180 21217-21218 21289 21296 21365 21386 21418 21424 21436 21763 22066-22067 22146 22349 22581 22619 22773 22823 22856 22908 22964 23028 23068 23094 23136 23140 23155 23176 23233 23272 23321 23388 23395 23870 23895 24580 24608 24629 24716 24763 25096 25113 26133 27392 28746 28784 29187 29569 29993 29999 30451 30477 30826 31104 32836 32844 32891 32937 32952 33050 33095 33100 33116 33193 33268 33312 33361 33500 33520 33537 33548 33565 33583 33694 33704 33707 33716 33850 33937 33996 34008 34012 34043 34047 34050 34054 34058 34073-34074 34099 34102 34126 34138 34140 34163-34165 34203 34206 34244-34245 34269 34290 34338 34384-34385 34406 34423 34436 34450 34464 34509 34586 34683 34757 34781 34790 34823 34825 34829-34830 34886 34909 34930 35075 35077 35123 35147 35149 35497 35861 36036 36130 36308 36346 36487 36578 36686 36713 36884 36899 36907 36928 36948 36961 36963 36967 36969 37006 37010 37012-37013 37060 37065 37075 37078 37120 37125 37172 37174 37177 37238 37248 37272 37287 37297 37302 37346 37414 37419 37494 37508 37522 37542 37628 37637 37652 37664 37678 37683 37688-37689 37695 37730 37745 37781 37783-37785 37787-37788 37790-37791 37794 37809-37811 37817 37838 37840 37970 38054 38061 38191 38341 38347 38359 38363 38382 38440 38454 38555 38593 38687 38742 38936 38950 38969 38985-38986 38997 39044 39051 39091 39122-39123 39208 39310 39336 39450 39452 39464 39489 39523-39524 39544 39579 39584 39616 39625 39627 39634 39735 39829 39851 40251 40596 40977 41128 41130-41131 41139 41158 41295 41361 41472 41481 41484 41505 41526 41528 41530 41553 41600 41798 42096 42242 42272 43571 43670 43677 43683 43704 44439 45072 45101 45108 45208 45336 45351 45382 45538 45544 45607 45746 45927 45964 46383 46615 46922 47120 47125 47205 47287 47366 47626 47703 47777 47863 47941 47943 48038 48061 48263 48274 48559 48651 48905https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/568/A26?format=asciiOpticaldefaultJ/A+A/568/A26/aver-rvRadial velocities used in this workSimbadNameSimbad column added by the CDSmeta.idcharAssAssociation (G2)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[B] Potential SB2 system (G1)meta.notecharNameStar namemeta.id;meta.maincharNmNumber of data for this star in the 3 tablesmeta.numberintnullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainNobs[1/11]? Number of observationsmeta.numberintnullableRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RV? Radial velocity errorkm/sstat.errorfloatnullablen_RV[AB] Reliability of RV error (1)meta.notecharr_RV[a-v] Reference for value used (2)meta.ref;pos.framecharMmb[N] Member of association with new data (N=No)meta.notecharJ/A+A/568/A26/sb2-rvComponent radial velocity values for SB2/SB3 systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[A] Target not in Simbad (G1)meta.notecharNameStar namemeta.id;meta.maincharNmNumber of data for this star in the 3 tablesmeta.numberintnullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainMJDModified Julian date of observationdtime.epochfloatAssAssociation (G2)meta.id.parentcharF2/1? Flux ratio of 2nd component to 1stphot.flux;arith.ratiofloatnullableF3/1? Flux ratio of 3rd component to 1stphot.flux;arith.ratiofloatnullableRV1Radial velocity of 1st componentkm/sphys.veloc;pos.heliocentricfloate_RV1Error on RV1km/sstat.errorfloatRV2Radial velocity if 2nd componentkm/sphys.veloc;pos.heliocentricfloate_RV2Error on RV2km/sstat.errorfloatRV3? Radial velocity of 3rd component valuekm/sphys.veloc;pos.heliocentricfloatnullablee_RV3? Error on RV3km/sstat.errorfloatnullableMmb[N] Member of association with new data (N=No)meta.notecharJ/A+A/568/A26/membersMembership list used in this workSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[A] Target not in Simbad (G1)meta.notecharNameStar namemeta.id;meta.maincharNmNumber of data for this star in the 3 tablesmeta.numberintnullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagMagnitude in Vmagphot.mag;em.opt.VfloatXposX galactic position (distance)pcpos.distance;pos.cartesian.x;pos.galacticfloatYposY galactic position (distance)pcpos.distance;pos.cartesian.y;pos.galacticfloatZposZ galactic position (distance)pcpos.distance;pos.cartesian.z;pos.galacticfloatDDistance [sqrt(X^2^+Y^2^+Z^2^)]pcpos.distance;pos.heliocentricfloatSpTSpectral typesrc.spTypecharAssAssociation (G2)meta.id.parentcharMmb[N] Member of association with new data (N)=Nometa.notechar