J/ApJ/901/23ivo://CDS.VizieR/J/ApJ/901/23doi:10.26093/cds/vizier.19010023CDSHansen T.T.Riley A.H.Strigari L.E.Marshall J.L.Ferguson P.S.,Zepeda J.Sneden C.2023-06-06T08:44:10Z2022-02-15T14:52:43ZCDS support team

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

cds-question@unistra.frchemical-abundancesline-intensitiesradial-velocitymilky-way-galaxyvisible-astronomyspectroscopyRecent analysis of the second data release of Gaia has revealed a number of new stellar streams surrounding the Milky Way. It has been suggested that one of these streams, Gjoll, is associated with the globular cluster NGC 3201, but thus far the association has only been based on kinematics of the stream stars. In this work we identify five likely stream members in the Gaia data that are bright enough for high-resolution spectroscopic follow-up with the Harlan J. Smith telescope at McDonald Observatory. One star is ruled out as a member based on its radial velocity. Abundance analysis of the remaining four kinematic members reveals a good chemical match to NGC 3201 for two of the stars, driven by their similar Al and {alpha}-element abundances. Of the remaining two, one shows no chemical similarity to NGC 3201 and is likely an unassociated Milky Way halo field star, while the other exhibits a similar Al abundance but has somewhat lower {alpha}-element abundances. The chemical tagging of stars in the Gjoll stream to NGC3201 confirms this association and provides direct proof of the hierarchical formation of the Milky Way.2020ApJ...901...23Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/901/23CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)J/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003)J/A+A/505/139 : Abundances of red giants in 17 GCs (Carretta+, 2009)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/ApJ/778/149 : Abundances for 3 stars in Sgr dSph (McWilliam+, 2013)J/ApJ/801/69 : Iron EWs for NGC3201 giant star members (Mucciarelli+, 2015)J/MNRAS/446/3319 : Line list for the NGC 1851 stars (Yong+, 2015)J/AJ/156/18 : APOGEE: companions of evolved stars (Price-Whelan+, 2018)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/ApJ/864/57 : Abund. of field & GC RR Lyrae. I. NGC3201 (Magurno+, 2018)J/A+A/616/A7 : Gaia DR2 RV standard stars catalog (Soubiran+, 2018)J/MNRAS/486/2995 : GD-1 stellar stream (Malhan+, 2019)J/AJ/158/223 : Pal 5 stellar stream RR Lyrae members (Price-Whelan+, 2019)J/ApJ/883/84 : 2 metal-poor stars in Sylgr stream (Roederer+, 2019)J/ApJ/885/3 : Membership in 12 stellar streams from DES (Shipp+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/901/23https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/901/23http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/901/23https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/901/23https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/901/23http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/901/23GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/901/23/table1 (Known and suspected Gjoll stream stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/901/23/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/901/23/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/901/23/table1?GETtext/xml+votable180.050000true63.32578141.82696720.0055555555555555565/5186 5303 5655 5693 6/20605 20726 20733-20734 20737 20739 20741-20742 20768 20770 20772 20778 20865-20866 20872-20874 20898-20899 21077 21079 21084 21086 21105 21110-21111 21117 21119 21201 21205-21206 21233 21238 21243 21245-21246 21250 21258 21286 21378 22612-22614 22647 22652-22654 22740 22743 22748 22750 22781 22783 22826 22915 22944-22946 22953-22954 23121 23133 23135 23156-23157 23167 23252 23255 23260 23262 23287 23292 23296 23298 23427 23431 23434 23438 23440 23457-23458 23460 38426-38427 38430-38431 38437 38446 38450-38453 38457 38459 38475-38476 38496-38497 39677 39704 39715 39718 39729-39730 39819 39821 39826 39832 398481.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/901/23?format=asciiOpticaldefaultJ/ApJ/901/23/table1Known and suspected Gjoll stream starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 source identifier (1)meta.id;meta.mainprimaryRAdeg[56.8/152.3] Right Ascension (J2000)degpos.eq.raDEdeg[-48.1/8.8] Declination (J2000)degpos.eq.decGmag[13.1/19.7] Apparent Gaia DR2 magnitudemagphot.mag;em.optfloatGB-GR[0.49/1.3] Gaia DR2 (G_BP_-G_RP_) color indexmagphot.color;em.opt.B;em.opt.Rfloatplx[-0.45/1.57] Gaia DR2 parallaxmaspos.parallax.trigfloate_plx[0.02/0.7] Uncertainty in plxmasstat.error;pos.parallaxfloatSimbadSimbad column added by the CDSmeta.ref.urlcharpmRA[8.2/24.9] Proper motion along RA * cos(DE)mas/yrpos.pm;pos.eq.rafloate_pmRA[0.03/1.2] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-24.8/-2.1] Proper motion along DEmas/yrpos.pm;pos.eq.decfloate_pmDE[0.03/1.1] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatHRV[-150.6/112.1]? Heliocentric radial velocity (1)km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV[0.6/4.4]? Uncertainty in HRV (1)km/sstat.errorfloatnullabler_HRV[*] * = from Ibata+ 2019ApJ...872..152Imeta.ref;pos.framecharI19In Ibata+ (from Ibata+ 2019ApJ...872..152I)?meta.codecharNfeNumber of FeI/FeII measurements for this star (link to Table 5)meta.numberintnullableAbundDisplay the equivalent widths and abundances for this star (link to Table 6)meta.ref.urlchar_RAPositions from SIMBAD (Gaia data) (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD (Gaia data) (declination part)degpos.eq.dec;meta.mainJ/ApJ/901/23/table5EW and atomic data for FeI and FeII lines used for parameter determinationGaiaGaia DR2 source identifiermeta.id;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonSpecies identifier ("Fe I" or "Fe II")phys.atmol.ionStagecharlambda[4067.97/8387.77] Wavelength; Angstroms0.1nmem.wlfloatExPot[0/4.8] Excitation potentialeVphys.atmol.excitationfloatlog(gf)[-4.97/0.65] log oscillator strengthphys.atmol.oscStrengthfloatEW[12.8/141.2] Equivalent width0.1nmspect.line.eqWidthfloate_EW[2.9/11.3] Uncertainty in EW0.1nmstat.error;spect.line.eqWidthfloatlog(e)[5.5/6.8] log abundancephys.abundfloatJ/ApJ/901/23/table6Individual line abundanceslog(e)7[-0.4/6.9]? Gaia 31873905 log abundancephys.abundfloatnullableEW8[15.8/223.3]? Gaia 29901421 equivalent width0.1nmspect.line.eqWidthfloatnullablef_EW8s = derived synthesis analysismeta.codecharlog(e)8[0.07/6.5]? Gaia 29901421 log abundancephys.abundfloatnullableEW2[10.3/171.1]? Gaia 32591587 equivalent width0.1nmspect.line.eqWidthfloatnullablef_EW2s = derived synthesis analysismeta.codecharlog(e)2[0.3/6.1]? Gaia 32591587 log abundancephys.abundfloatnullablelog(gf)[-5.7/0.32]? log oscillator strengthphys.atmol.oscStrengthfloatnullableEW3[19.4/166.5]? Gaia 32541125 equivalent width0.1nmspect.line.eqWidthfloatnullablef_EW3s = derived synthesis analysismeta.codecharlog(e)3[-0.01/7.4]? Gaia 32541125 log abundancephys.abundfloatnullableEW7[22.1/200.3]? Gaia 31873905 equivalent width0.1nmspect.line.eqWidthfloatnullablef_EW7s = derived synthesis analysismeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonSpecies identifierphys.atmol.ionStagecharlambda[3783.53/7836.13] Wavelength; Angstroms0.1nmem.wlfloatExPot[0/5.08]? Excitation potentialeVphys.atmol.excitationfloatnullable