J/MNRAS/513/5920ivo://CDS.VizieR/J/MNRAS/513/5920doi:10.26093/cds/vizier.75135920CDSFeldmeier-Krause A.2024-08-22T20:15:37Z2022-08-30T12:23:58ZCDS support team

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

cds-question@unistra.frmilky-way-galaxylate-type-starsinfrared-sourceseffective-temperatureradial-velocitychemical-abundancesThe Milky Way nuclear star cluster (NSC) is located within the nuclear stellar disc (NSD) in the Galactic Centre. It is not fully understood if the formation and evolution of these two components are connected, and how they influence each other. We study the stellar populations in the transition region of NSC and NSD. We observed two ~4.3pc^2^ fields with the integral-field spectrograph KMOS (VLT), located at r~20pc (>4Re) to the Galactic East and West of the NSC. We extract and analyse medium-resolution stellar spectra of >200 stars per field. The data contain in total nine young star candidates. We use stellar photometry to estimate the stellar masses, effective temperatures, and spectral types of the young stars. The stars are consistent with an age of 4-6Myr, they may have formed inside the Quintuplet cluster, but were dispersed in dynamical interactions. Most stars in the two fields are red giant stars, and we measure their stellar metallicities [M/H] using full spectral fitting. We compare our [M/H] distributions to the NSC and NSD, using data from the literature, and find that the overall metallicity decreases from the central NSC, over the transition region, to the NSD. The steep decrease of [M/H] from the NSC to the region dominated by the NSD indicates that the two components have distinct stellar populations and formation histories.2022MNRAS.513.5920Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/5920CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/295 : Spitzer IRAC survey of the galactic center (Ramirez+, 2008)J/A+A/631/A20 : GALACTICNUCLEUS JHKs imaging survey. II. (Nogueras-Lara+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/5920https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/513/5920http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/513/5920https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/513/5920https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/513/5920http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/513/5920GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/513/5920/tableb1 (Stellar parameters of our sample (corrected table, 02-Aug-2023))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/5920/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/5920/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/5920/tableb1?GETtext/xml+votable180.050000true266.50064-28.89101190.0055555555555555566/28830https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/513/5920?format=asciiInfrareddefaultJ/MNRAS/513/5920/tableb1Stellar parameters of our sample (corrected table, 02-Aug-2023)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdIdentification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainTeffEffective temperatureKphys.temperature.effectiveinte_TeffLower uncertainty of effective temperatureKstat.error;phys.temperature.effectiveintE_TeffUpper uncertainty of effective temperatureKstat.error;stat.maxint[M/H]Metallicityphys.abund.Zfloate_[M/H]Lower uncertainty of metallicitystat.error;phys.abundfloatE_[M/H]Upper uncertainty of metallicitystat.error;stat.maxfloatloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggLower uncertainty of surface gravitylog(cm.s**-2)stat.errorfloatE_loggUpper uncertainty of surface gravitylog(cm.s**-2)stat.error;stat.maxfloatRVRadial velocity in local standard of restkm/sspect.dopplerVeloc;pos.lsrfloate_RVLower uncertainty of radial velocitykm/sstat.errorfloatE_RVUpper uncertainty of radial velocitykm/sstat.error;stat.maxfloatKsmag0Ks-band magnitude after extinction correctionmagphot.mag;arith.difffloat