J/MNRAS/431/1005ivo://CDS.VizieR/J/MNRAS/431/1005doi:10.26093/cds/vizier.74311005CDSde Silva G.M.D'Orazi V.Melo C.Torres C.A.O.Gieles M.Quast G.R.,Sterzik M.2026-01-13T20:14:15Z2014-02-17T15:30:44ZCDS support team

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

cds-question@unistra.frstellar-associationsyoung-stellar-objectschemical-abundancesWe explore the possible connection between the open cluster IC 2391 and the unbound Argus association identified by the search for associations containing young stars survey. In addition to common kinematics and ages between these two systems, here we explore their chemical abundance patterns to confirm if the two substructures shared a common origin. We carry out a homogeneous high-resolution elemental abundance study of eight confirmed members of IC 2391 as well as six members of the Argus association using UVES spectra. We derive spectroscopic stellar parameters and abundances for Fe, Na, Mg, Al, Si, Ca, Ti, Cr, Ni and Ba. All stars in the open cluster and Argus association were found to share similar abundances with the scatter well within the uncertainties, where [Fe/H]=-0.04+/-0.03 for cluster stars and [Fe/H]=-0.06+/-0.05 for Argus stars. Effects of overionization/excitation were seen for stars cooler than roughly 5200K as previously noted in the literature. Also, enhanced Ba abundances of around 0.6dex were observed in both systems. The common ages, kinematics and chemical abundances strongly support the fact that the Argus association stars originated from the open cluster IC 2391. Simple modelling of this system finds this dissolution to be consistent with two-body interactions.2013MNRAS.431.1005Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/1005CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/372/862 : Lithium abundances in IC 2602 and IC 2391 (Randich+, 2001)J/A+A/461/509 : Membership and spectroscopy of IC 2391 (PPM) (Platais+, 2007)J/A+A/531/A143 : Rotational velocities of HR stars (Diaz+, 2011)J/AcA/62/67 : ASAS photometry of ROSAT sources (Kiraga, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/1005https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/1005http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/1005https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/1005https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/1005http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/1005GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/431/1005/table1 (Revised list of high-probability members for the Argus association)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/1005/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/1005/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/1005/table1?GETtext/xml+votable180.050000true83.746667-29.9011110.005555555555555556Cone search capability for table J/MNRAS/431/1005/table2 (Revised list of high-probability members proposed for the open cluster IC 2391)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/1005/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/1005/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/1005/table2?GETtext/xml+votable180.050000true127.144167-52.6177780.0055555555555555566/20507 20645 37078 37172 37174 37272 37297 37628 37637 37678 37683 37688 37785 37787-37788 37790-37791 37809-37811 37817 38454 38555 38593 39051 39123 39208 39310 39524 39735 39851 40251 40596 41139 41158 41361 41481 41553 43683 473663.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/431/1005?format=asciidefaultJ/MNRAS/431/1005/table1Revised list of high-probability members for the Argus associationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintN[*+] New member or more data (G1)meta.code.membercharNameNamemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainpmRAProper motion along RAmas/yrpos.pm;pos.eq.rafloatpmDEProper motion along DEmas/yrpos.pm;pos.eq.decfloatn_pmDE[i] i: proper motion from literature (2)meta.notecharRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatn_RV[i] i: RV from literature (2)meta.notecharvsini? Rotational velocitykm/sphys.veloc.rotatfloatnullablen_vsini[i] i: vsini from literature (2)meta.notecharPer? Photometric perioddtime.perioddoublenullablen_Per[i] i: Per from literature (2)meta.notecharVmagJohnson V magnitudemagphot.mag;em.opt.Vfloatn_Vmag[i] i: photometry from literature (2)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharV-Ic? Johnson-Cousins V-Ic colour indexmagphot.color;em.opt.V;em.opt.IfloatnullableSpTMK spectral typesrc.spTypecharn_SpT[i] i: SpT from literature (2)meta.notecharEWLi? Li equivalent width0.1nmspect.line.eqWidthintnullablen_EWLi[i] i: EWLi from literature (2)meta.notecharplxKinematical parallaxmaspos.parallax.dynfloatn_plx[i] i: plx from literature (2)meta.notecharUHeliocentric velocity towards Gal. centerkm/sspect.dopplerVeloc;pos.heliocentricfloatVHeliocentric velocity towards Gal. rotationkm/sphys.veloc.rotat;pos.heliocentricfloatWHeliocentric velocity towards N. Gal. Polekm/sspect.dopplerVeloc;pos.heliocentricfloatXHeliocentric distance towards Gal. centerpcpos.distance;pos.heliocentricfloatYHeliocentric distance towards Gal. rotationpcpos.distance;pos.heliocentricfloatZHeliocentric distance towards N. Gal. Polepcpos.cartesian.z;pos.galacticfloatMmb[0/1] Membership probabilitydstat.probabilityfloatRefReferences (3)meta.refcharNotesNotesmeta.notecharJ/MNRAS/431/1005/table2Revised list of high-probability members proposed for the open cluster IC 2391PMMIdentification in Platais et al. 2007, Cat. J/A+A/461/509, <Cl* IC 2391 PMM NNNN> in Simbadmeta.id;meta.mainintpmRAProper motion along RAmas/yrpos.pm;pos.eq.rafloatpmDEProper motion along DEmas/yrpos.pm;pos.eq.decfloatr_pmDE[PU] U: from UCAC4 (I/322), P: from Platais et al. (2007, J/A+A/461/509)meta.ref;pos.pm;pos.eq.deccharRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatvsini? Rotational velocitykm/sphys.veloc.rotatfloatnullablePer? Photometric perioddtime.periodfloatnullablen_Per[i] i: Per from literature (2)meta.notecharVmagJohnson V magnitudemagphot.mag;em.opt.VfloatSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintN[*+] New member or more data (G1)meta.code.membercharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainn_Vmag[i] i: photometry from literature (2)meta.notecharCI? Johnson B-V color index, or V-Ic (see n_B-V)magphot.colorfloatnullablen_CI[*] *: V-Ic color index in CImeta.notecharSpTMK spectral typesrc.spTypecharn_SpT[i] i: SpT from literature (2)meta.notecharEWLi? Li equivalent width0.1nmspect.line.eqWidthintnullableplxKinematical parallaxmaspos.parallax.dynfloatUHeliocentric velocity towards Gal. centerkm/sspect.dopplerVeloc;pos.heliocentricfloatVHeliocentric velocity towards Gal. rotationkm/sphys.veloc.rotat;pos.heliocentricfloatWHeliocentric velocity towards N. Gal. Polekm/sspect.dopplerVeloc;pos.heliocentricfloatXHeliocentric distance towards Gal. centerpcpos.distance;pos.heliocentricfloatYHeliocentric distance towards Gal. rotationpcpos.distance;pos.heliocentricfloatZHeliocentric distance towards N. Gal. Polepcpos.cartesian.z;pos.galacticfloatMmb[0/1] Membership probabilitydstat.probabilityfloatRefReferences (3)meta.refcharEWDetailed equivalent widths (table A1)meta.ref.urlcharJ/MNRAS/431/1005/table4Stellar parameters and abundances[Si/Fe]Abundance [Si/Fe]log(Sun)phys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField (IC 2391 or ARGUS)meta.id;obs.fieldcharNameStar name (1)meta.id;meta.maincharRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableVsini? Rotational velocitykm/sphys.veloc.rotatfloatnullableTeff? Effective temperatureKphys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablevturb? Microturbulent velocity {xi}km/sphys.velocfloatnullable[FeI/H]Abundance [FeI/H]log(Sun)phys.abundfloate_[FeI/H]rms uncertainty on [FeI/H]log(Sun)stat.error;phys.abundfloat[FeII/H]? Abundance [FeII/H]log(Sun)phys.abundfloatnullablee_[FeII/H]? rms uncertainty on [FeII/H]log(Sun)stat.error;phys.abundfloatnullable[Na/Fe]Abundance [Na/Fe]log(Sun)phys.abundfloate_[Na/Fe]rms uncertainty on [Na/Fe]log(Sun)stat.error;phys.abundfloat[Mg/Fe]Abundance [Mg/Fe]log(Sun)phys.abundfloate_[Mg/Fe]rms uncertainty on [Mg/Fe]log(Sun)stat.error;phys.abundfloat[Al/Fe]? Abundance [Al/Fe]log(Sun)phys.abundfloatnullablee_[Al/Fe]? rms uncertainty on [Al/Fe]log(Sun)stat.error;phys.abundfloatnullablee_[Si/Fe]rms uncertainty on [Si/Fe]log(Sun)stat.error;phys.abundfloat[Ca/Fe]Abundance [Ca/Fe]log(Sun)phys.abundfloate_[Ca/Fe]rms uncertainty on [Ca/Fe]log(Sun)stat.error;phys.abundfloat[TiI/Fe]Abundance [TiI/Fe]log(Sun)phys.abundfloate_[TiI/Fe]rms uncertainty on [TiI/Fe]log(Sun)stat.error;phys.abundfloat[TiII/Fe]Abundance [TiII/Fe]log(Sun)phys.abundfloate_[TiII/Fe]rms uncertainty on [TiII/Fe]log(Sun)stat.error;phys.abundfloat[CrI/Fe]Abundance [CrI/Fe]log(Sun)phys.abundfloate_[CrI/Fe]rms uncertainty on [CrI/Fe]log(Sun)stat.error;phys.abundfloat[CrII/Fe]Abundance [CrII/Fe]log(Sun)phys.abundfloate_[CrII/Fe]rms uncertainty on [CrII/Fe]log(Sun)stat.error;phys.abundfloat[Ni/Fe]Abundance [Ni/Fe]log(Sun)phys.abundfloate_[Ni/Fe]rms uncertainty on [Ni/Fe]log(Sun)stat.error;phys.abundfloat[BaII/Fe]Abundance [BaII/Fe]log(Sun)phys.abundfloate_[BaII/Fe]rms uncertainty on [BaII/Fe]log(Sun)stat.error;phys.abundfloatJ/MNRAS/431/1005/tablea1Atomic Line listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElElement and ionisation stagephys.atmol.element;phys.atmol.ionizationcharA[134/138]? Isotope (for Ba)phys.atmol.weightintnullablelambdaWavelength {lambda}0.1nmem.wldoubleEPEnergy potentialeVphys.energy;phys.atmol.levelfloatloggfOscillator strengthphys.atmol.oscStrengthfloatEW? Equivalent width for PMM33590.1pmspect.line.eqWidthfloatnullable