J/ApJ/908/L5ivo://CDS.VizieR/J/ApJ/908/L5doi:10.26093/cds/vizier.19089005CDSSoltis J.Casertano S.Riess A.G.2024-11-06T20:23:09Z2024-03-12T06:56:28ZCDS support team

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

cds-question@unistra.frvisible-astronomyopen-star-clustersmilky-way-galaxytrigonometric-parallaxphotometryWe use data from the ESA Gaia mission Early Data Release 3 (EDR3) to measure the trigonometric parallax of {omega}Cen, the first high-precision parallax measurement for the most massive globular cluster in the Milky Way. We use a combination of positional and high-quality proper motion data from EDR3 to identify over 100000 cluster members, of which 67000 are in the magnitude and color range where EDR3 parallaxes are best calibrated. We find the estimated parallax to be robust, demonstrating good control of systematics within the color-magnitude diagram of the cluster. We find a parallax for the cluster of 0.191{+/-}0.001(statistical){+/-}0.004(systematic)mas (2.2% total uncertainty) corresponding to a distance of 5.24{+/-}0.11kpc. The parallax of {omega}Cen provides a unique opportunity to directly and geometrically calibrate the luminosity of the tip of the red giant branch (TRGB) because it is the only cluster with sufficient mass to provide enough red giant stars, more than 100 one magnitude below the tip, for a precise, model-free measurement of the tip. Combined with the preexisting and most widely used measurements of the tip and foreground Milky Way extinction, we find MI,TRGB=-3.97{+/-}0.06mag for the I-band luminosity of the blue edge. Using the TRGB luminosity calibrated from the Gaia EDR3 parallax of {omega}Cen to calibrate the luminosity of Type Ia supernovae results in a value for the Hubble constant of H0=72.1{+/-}2.0km/s/Mpc. We make the data for the stars in {omega}Cen available electronically and encourage independent analyses of the results presented here.2021ApJ...908L...5Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/908/L5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/195 : Globular Clusters in the Milky Way (Harris, 1996)VII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/A+AS/120/139 : Variables in Omega Cen Fields 5139A-C (Kaluzny+ 1996)J/ApJ/652/1133 : BVI photometry of NGC 4258 Cepheids (Macri+, 2006)J/AJ/140/631 : HST WFC3/UVIS photometry of omega Cen core (Bellini+, 2010)J/AJ/142/187 : HST observations of 7 PopII variable stars (Benedict+, 2011)J/A+A/583/A76 : OmegaCen candidates RAVEselected (Fernandez-Trincado+, 2015)J/ApJ/812/149 : HSTPROMO. III. Dynamical distances (Watkins+, 2015)J/ApJ/829/108 : Kinematic data of Galactic globular clusters (Eadie+, 2016)J/ApJ/844/164 : HST astro-photometric of NGC5139. III. (Bellini+, 2017)J/MNRAS/478/1520 : Milky Way globular clusters data (Baumgardt+, 2018)J/ApJ/853/86 : HST large programme on {omega}Centauri. II. (Bellini+, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/MNRAS/482/5138 : Galactic GC mean pm & velocities (Baumgardt+, 2019)J/ApJ/870/115 : Reddening, dist modulus & Fe/H of RRLs in wCen (Bono+, 2019)J/ApJ/874/150 : The first 3yrs of DES-SN (DES-SN3YR) (Brout+, 2019)J/MNRAS/489/3093 : Gaia DR2 parallax of globular clusters (Shao+, 2019)J/ApJ/886/61 : OGLE-III, MCPS and HST VI obs. of LMC & SMC (Yuan+, 2019)J/ApJ/889/5 : HST obs Mira variables in SNIa host NGC1559 (Huang+, 2020)J/ApJ/906/125 : Carnegie-Chicago Hubble Program IX. TRGB M106 (Jang+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/908/L5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/908/L5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/908/L5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/908/L5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/908/L5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/908/L5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/908/L5/fig5 (Color-magnitude diagram for {omega} Centauri)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/908/L5/fig5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/908/L5/fig5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/908/L5/fig5?GETtext/xml+votable180.050000true202.00412524262714-47.5152274353369960.0055555555555555566/43225-43228 43230 43249https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/908/L5?format=asciiOpticaldefaultJ/ApJ/908/L5/fig5Color-magnitude diagram for {omega} CentaurirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia mission Early Data Release 3 index identifiermeta.id;meta.mainRAICRS[200/203] Right Ascension, (ICRS at epoch 2016.0)degpos.eq.ra;meta.mainindexedDEICRS[-49/-46] Declination, (ICRS at epoch 2016.0)degpos.eq.dec;meta.mainindexedGmag[11.8/19.5] G-band magnitudemagphot.mag;em.opt.VdoubleBpRp[0.0009/1.5] Gaia Bp-Rp colormagphot.color;em.opt.B;em.opt.RdoubleplxGaia DR3 parallaxmaspos.parallax.trigchare_plx[0.01/2] Uncertainty in plxmasstat.error;pos.parallaxdoubleplx0[-0.05/0.009] Gaia parallax zeropoint correction (subtract this from parallax)maspos.parallax.trigdoubleGOFGaia mission Early Data Release 3 goodness of fitstat.fit.goodness;time.release;instr.obstycharcutPasses color-magnitude diagram cut; True or Falsemeta.codechar