J/ApJ/958/8ivo://CDS.VizieR/J/ApJ/958/8doi:10.26093/cds/vizier/ba-xy-8CDSNitschai M.S.Neumayer N.Clontz C.Haberle M.Seth A.C.,Husser T.-O.Kamann S.Alfaro-Cuello M.Kacharov N.Bellini A.,Dotter A.Dreizler S.Feldmeier-Krause A.Latour M.Libralato M.,Milone A.P.Pechetti R.van de Ven G.Voggel K.Weisz D.R.2026-07-02T12:01:03Z2026-02-05T08:57:18ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvisible-astronomyspectroscopyradial-velocitychemical-abundanceseffective-temperaturehst-photometryOmega Centauri ({omega} Cen) is the most massive globular cluster of the Milky Way and has been the focus of many studies that reveal the complexity of its stellar populations and kinematics. However, most previous studies have used photometric and spectroscopic data sets with limited spatial or magnitude coverage, while we aim to investigate it having full spatial coverage out to its half-light radius and stars ranging from the main sequence to the tip of the red giant branch. This is the first paper in a new survey of {omega} Cen that combines uniform imaging and spectroscopic data out to its half-light radius to study its stellar populations, kinematics, and formation history. In this paper, we present an unprecedented MUSE spectroscopic data set combining 87 new MUSE pointings with previous observations collected from guaranteed time observations. We extract spectra of more than 300,000 stars reaching more than 2 magnitudes below the main-sequence turnoff. We use these spectra to derive metallicity and line-of-sight velocity measurements and determine robust uncertainties on these quantities using repeat measurements. Applying quality cuts we achieve signal-to-noise ratios (S/Ns) of 16.47/73.51 and mean metallicity errors of 0.174/0.031dex for the main-sequence stars (18mag<mag_F625W_<22mag) and red giant branch stars (16mag<mag_F625W_<10mag), respectively. We correct the metallicities for atomic diffusion and identify foreground stars. This massive spectroscopic data set will enable future studies that will transform our understanding of {omega} Cen, allowing us to investigate the stellar populations, ages, and kinematics in great detail.2023ApJ...958....8Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/958/8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/195 : Globular Clusters in the Milky Way (Harris, 1996)VII/202 : Globular Clusters in the Milky Way (Harris, 1997)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AJ/113/634 : The survival of Sagittarius dwarf galaxy (Ibata+ 1997)J/AJ/133/1658 : ACS survey of galactic globular clusters (Sarajedini+, 2007)J/ApJ/663/296 : UBV(RI)c phot. of omega Cen subgiants (Villanova+, 2007)J/ApJ/710/1032 : Proper motions in {omega} Cen (Anderson+, 2010)J/AJ/140/631 : HST WFC3/UVIS photometry of omega Cen core (Bellini+, 2010)J/ApJ/722/1373 : {omega} Centauri giants abundances (Johnson+, 2010)J/MNRAS/441/3570 : Nuclear star clusters in spiral galaxies (Georgiev+, 2014)J/ApJ/791/107 : Parameters of NGC 5139 SGBs stars (Villanova+, 2014)J/AJ/149/53 : Radial velocities of 12 MW globular clusters (Kimmig+, 2015)J/A+A/588/A148 : NGC 6397 stars MUSE spectra (Husser+, 2016)J/ApJ/844/164 : HST astro-phot. analysis of NGC5139. III. (Bellini+, 2017)J/MNRAS/478/1520 : Milky Way globular clusters data (Baumgardt+, 2018)J/MNRAS/482/5138 : Gal. GC mean proper motions & velocities (Baumgardt+, 2019)J/A+A/632/A3 : MUSE binaries in NGC 3201 (Giesers+, 2019)J/other/NatAs/3.667 : Fimbulthul stream candidate stars (Ibata+, 2019)J/ApJ/878/18 : NGVS. XXIII. Nuclear star clusters (Sanchez-Janssen+, 2019)J/A+A/635/A114 : EW and [Fe/H] for globular cluster RGB stars (Husser+ 2020)J/AJ/159/254 : Parameters for metal-poor stars in NGC5139 (Johnson+, 2020)J/MNRAS/506/150 : The GALAH+ Survey DR3 (Buder+, 2021)J/A+A/653/L8 : Metallicities on multiple MSs of Omega Cen (Latour+, 2021)J/MNRAS/505/5978 : Gaia EDR3 view on Gal. globular clusters (Vasiliev+, 2021)J/ApJ/939/118 : Sagittarius dSph with MUSE. III. (Kacharov+, 2022)J/A+A/677/A86 : SHOTGLAS. II. BHB stars (Latour+, 2023)http://pampelmuse.readthedocs.io/en/latest/about.html : PampelMuse dochttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/958/8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/958/8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/958/8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/958/8https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/958/8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/958/8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/958/8/table3 (MUSE spectroscopic catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/958/8/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/958/8/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/958/8/table3?GETtext/xml+votable180.050000true201.6969135-47.47963940.0055555555555555566/432272.8600766693277496e-19 5.013615540373556e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/958/8?format=asciiOpticaldefaultJ/ApJ/958/8/table3MUSE spectroscopic catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/342797] Identifier of stars in MUSE spectroscopic catalogmeta.id;meta.mainintindexedRVel[-1409/1374] Line-of-sight velocity (v_los_) measured with SPEXXYkm/sspect.dopplerVelocdoublee_RVel[0.15/257] Scaled SPEXXY error in RVel (see Section 4.2)km/sstat.error;spect.dopplerVelocfloaterrRVel[0.15/273] SPEXXY uncertainty in RVel (see Section 4.2)km/sstat.error;spect.dopplerVelocfloatsRVel[0.93/3.54] Scaling factor for SPEXXY error line-of-sight velocity (see Section 4.2)stat.error;arith.factor;spect.dopplerVelocfloatRad[8.8e-5/0.12] Radius from cluster center (3)degphys.angSizedoubleRAJ2000[201.5/201.9] HST Right Ascension (J2000) (4)degpos.eq.ra;meta.mainindexedDEJ2000[-47.6/-47.3] HST Declination (J2000) (4)degpos.eq.dec;meta.mainindexedF435Wmag[11.7/32.1]? Magnitude in the HST/WFC F435W filter (B-band) from Anderson+ 2010, J/ApJ/710/1032magphot.mag;em.opt.BfloatnullableQ[0/1] Quality Flag (Section 4.7; 1=True, 156871 occurrences) (Flag)meta.code.qualintprv[-0.34/0.35] Perspective rotation (1)km/sphys.veloc.rotatfloatprvRVel[-1408/1374] SPEXXY line-of-sight velocity corrected for perspective rotationkm/sspect.dopplerVeloc;arith.diffdoubleTeff[2760/12716] Effective temperature measured with SPEXXYKphys.temperature.effectivefloate_Teff[0/8279] Scaled SPEXXY error in Teff (see Section 4.2)Kstat.error;phys.temperature.effectivefloaterrTeff[0/4962] SPEXXY uncertainty in TeffKstat.error;phys.temperature.effectivefloatsTeff[0.86/1.7] Scaling factor for SPEXXY error temperature (see Section 4.2)stat.error;arith.factor;phys.temperature.effectivefloatloggfix[0.2/6]? SPEXXY log of surface gravity, fixed from isochrone (Section 3.3)log(cm.s**-2)phys.gravityfloatnullableloggfree[0.076/6]? SPEXXY log surface gravity, free during fitlog(cm.s**-2)phys.gravityfloatnullable[M/H][-3.95/0.95] SPEXXY metallicity (MH)log(Sun)phys.abund.Zfloate_[M/H][0.0002/17418] Scaled SPEXXY error in [M/H] (see Section 4.2)log(Sun)stat.error;phys.abund.ZdoubleMHadc[-3.95/1.22]? SPEXXY metallicity with Atomic Diffusion correction (Section 4.5)log(Sun)phys.abund.Z;arith.difffloatnullableerr[M/H][0.0002/12767] SPEXXY uncertainty in [M/H]log(Sun)stat.errordoubles[M/H][1.28/1.8] Scaling factor for SPEXXY error metallicity (see Section 4.2)stat.error;arith.factor;phys.abund.ZfloatSNR[0.18/189] Signal-to-noise ratio of spectrum from SPEXXYstat.snrfloatffit[-100/1] Fixed, 1, or free, 0, log(g) in SPEXXY fitmeta.codefloatedge[-3.97/158] Distance of star to OB edge, PAMPELMUSE output (2)pixpos.distancefloatMagacc[0.015/1]? Relative accuracy of recovered magnitude from spectrum extraction, PAMPELMUSE (2)meta.code.qualfloatnullablespFlag[0/11] Spectrum extraction quality flag, PAMPELMUSE (0=best; see Section 3.1) (SpecFlag) (2)meta.code.qual;spectfloatRel[0.087/1] Reliability Parameter (Section 4.1) (2)meta.code.qualfloatNobs[1/66] Number of times the star was observed (Section 4.3) (Num)meta.number;obsintDataObserving program (GO, GTO or "GO_GTO" (both)) the star belongs tometa.id;obschare_F435Wmag[0/9.9]? RMS scatter of single-exposure F435W observationmagstat.error;phot.mag;em.opt.BfloatnullableF625Wmag[10.3/32]? Magnitude in the HST/WFC F625W filter (R-band) from Anderson+ 2010, J/ApJ/710/1032magphot.mag;em.opt.Rfloatnullablee_F625Wmag[0/9.9]? RMS scatter of single-exposure F625W observationmagstat.error;phot.mag;em.opt.RfloatnullableF435Wmagc[11.2/31.6]? The F435Wmag with Av and RV correctionmagphot.mag;em.opt.B;arith.difffloatnullableF625Wmagc[9.99/31.7]? The F625Wmag with Av and RV correctionmagphot.mag;em.opt.R;arith.difffloatnullableNBf[0/9]? Number of F435W images where star was found from Anderson+ 2010, J/ApJ/710/1032meta.number;obs;em.opt.BintnullableNRf[0/9]? Number of F625W images where star was found from Anderson+ 2010, J/ApJ/710/1032meta.number;obs;em.opt.RintnullablePMmRV[0/1]? Membership probability using radius and velocity (Section 4.4) (probRV)stat.probability;meta.code.memberfloatnullablePMmRVM[0/1]? Membership probability using radius, velocity and metallicity (probRVM)stat.probability;meta.code.memberfloatnullableHFlag[0/1]? HST Quality Flag (1=reliable) (HST10Flag) (5)meta.code.qualintnullableA10Display data from Anderson+ 2010, J/ApJ/710/1032 within 0.1" if F435Wmag is filledmeta.ref.urlchar