J/ApJ/950/83ivo://CDS.VizieR/J/ApJ/950/83CDSLi S.Casertano S.Riess A.G.2025-10-01T06:29:29Z2025-09-03T09:54:41ZCDS support team

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

cds-question@unistra.frgiant-starsmilky-way-galaxyphotometryvisible-astronomysurveystrigonometric-parallaxThe tip of the red giant branch (TRGB) is a standard candle that can be used to help refine the determination of the Hubble constant. Gaia Data Release 3 (DR3) provides synthetic photometry constructed from low-resolution BP/RP spectra for Milky Way field stars that can be used to directly calibrate the luminosity of the TRGB in the Johnson-Cousins I band, where the TRGB is least sensitive to metallicity. We calibrate the TRGB luminosity using a two-dimensional maximum likelihood algorithm with field stars and Gaia synthetic photometry and parallaxes. For a high-contrast and low-contrast break (characterized by the values of the contrast parameter R or the magnitude of the break {beta}), we find M^TRGB^_I_=-4.02 and -3.92mag respectively, or a midpoint of -3.970_-0.024_^+0.042^(sys)+/-0.062(stat)mag. This measurement improves upon the TRGB measurement from Li+ (2022, J/ApJ/939/96), as the higher precision photometry based on Gaia DR3 allows us to constrain two additional free parameters of the luminosity function. We also investigate the possibility of using Gaia DR3 synthetic photometry to calibrate the TRGB luminosity with {omega} Centauri, but find evidence of blending within the inner region for cluster member photometry that precludes accurate calibration with Gaia DR3 photometry. We instead provide an updated TRGB measurement of m^TRGB^_I_=9.82+/-0.04mag in {omega} Centauri using ground-based photometry from the most recent version of the database described in Stetson+ (2019, J/MNRAS/485/3042), which gives M^TRGB^_I_=-3.97+/-0.04(stat)+/-0.10(sys)mag when tied to the Gaia EDR3 parallax distance from the consensus of Vasiliev & Baumgardt (2021, J/MNRAS/505/5978), Soltis+ (2021, J/ApJ/908/L5), and Maiz Apellaniz J. (2022A&A...657A.130M).2023ApJ...950...83Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/950/83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/ApJ/829/108 : Kinematic data of Galactic globular clusters (Eadie+, 2016)J/ApJ/874/150 : The first 3yrs of DES-SN (DES-SN3YR) (Brout+, 2019)J/MNRAS/485/3042 : UBVRI photometry in 48 globular clusters (Stetson+, 2019)J/A+A/654/A20 : Plx zero-point offset from Gaia EDR3 (Groenewegen, 2021)J/A+A/649/A3 : Gaia EDR3 photometric passbands (Riello+, 2021)J/ApJ/908/L5 : Color-magnitude diagram for {omega} Centauri (Soltis+, 2021)J/MNRAS/505/5978 : Gaia EDR3 view on Gal. globular clusters (Vasiliev+, 2021)J/ApJ/939/96 : Milky Way field giants from Gaia & APASS I-band (Li+, 2022)J/A+A/674/A33 : Gaia synthetic phot. cat. of white dwarfs (Gaia Coll., 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/950/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/950/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/950/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/950/83https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/950/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/950/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/950/83/table1 (Milky Way field giants used for the tip of the red giant branch (TRGB) measurement)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/83/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/83/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/83/table1?GETtext/xml+votable180.050000true139.4768.0360.0055555555555555565/12129 6/38 69 73 179 554 588 615 655 702-703 2064 4169 4171 4198 4311 4313 4319 4357 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44652 44654 44658-44659 44661 44667 44674 44676 44678 44684-44685 44694 44698-44699 44702 44707 44727 44729 44750 44754-44755 44759 44764 44771 44773 44776 44787 44794 44808-44809 44812 44819 44830-44832 44840 44854 44857-44858 44862 44866-44867 44876-44877 44892 44895 44899 44902-44903 44911 44913-44915 44918 44920 44936 44938 44940 44946 44948 44952 44955 44959 44962 44972 44982 44990 44994 44997 44999 45012 45014-45015 45019 45136 45169-45171 45174-45175 45183 45264-45265 45267 45270 45297 45300 45302 45311 45313 45318 45321 45326 45330 45339 45344 45347 45352-45354 45356 45371 45382 45409 45411-45412 45435 45439 45449 45457-45458 45460 45465 45472-45473 45475 45478 45483 45504 45513 45518 45555 45833 45835 45839 45848 45850 45852-45853 45860-45862 45875-45876 45878 45883 45887 45898 45909 45919 45927 45929-45930 45933 45939 45944 45947 45973 45979 46003 46007 46012 46015 46018-46019 46023 46026-46027 46031 46033 46042 46051 46057-46058 46062 46065 46069 46073 46077 46079 46081 46113 46118 46121 46128 46143 46189 46198 46229 46245 46248 46256 46267 46280 46295 46301 46303 46306 46328 46334 46369 46393 46395 46406 46418 46483 46491 46495 46523 46532 46543 46557 46560 46587 46593 46600 46604 46622-46624 46626 46642 46648 46650 46686 46698-46699 46713 46725-46726 46741 46747-46748 46754 46760 46762 46780 46787 46797 46822 46827 46833 46838 46841 46864 46869 46872 46875 46893 46896 46924 46931 46937-46938 46943 46949 46958 46975-46977 46981 46988 46994-46995 46998 47010 47017 47043 47047 47049 47053 47086 47094 47381 47425-47426 47431 47433 47436 47441 47443 47447 47449 47453 47485 48132 48137 48139-48140 48142 48144 48147 48149 48161-48163 48168-48169 48171 48176 48186 48190 48192 48200-48201 48207 48209 48212-48213 48220 48230 48242 48244 48248-48249 48255 48261 48281 48284-48286 48327 48329 48332 48334-48337 48339 48344-48345 48350-48351 48353 48356 48368 48370 48373-48374 48380-48382 48386-48387 48392 48394 48415 48424 48434-48435 48437 48441 48445-48446 48454 48469 48472 48474 48488 48495 48507-48508 48511 48514 48525 48546 48550 48555 48563 48567-48568 48573 48575-48577 48580 48606 48609 48619 48627-48629 48896-48897 48900-48901 48903 48919-48920 48924-48926 48964 48968 48974 48978 48981 48983 48987 49008 49020https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/950/83?format=asciiOpticaldefaultJ/ApJ/950/83/table1Milky Way field giants used for the tip of the red giant branch (TRGB) measurementrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR3 identifiermeta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainImag[8/11.7] Gaia Synthetic Photometry Catalog (GSPC) I band synthetic Vega magnitudemagphot.mag;em.opt.Ifloate_Imag[0.01/0.05] Uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatVmag[9.2/13.5] Synthetic GSPC V band Vega magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.01/0.08] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatplx[0.05/0.7] Gaia EDR3 parallaxmaspos.parallax.trigfloate_plx[0.009/0.04] Uncertainty in plxmasstat.error;pos.parallaxfloatsinb[0.58/1] Sin of the absolute Galactic latitude, sin(|b|)pos.galactic.latfloatL22Display data from Li+ 2022, J/ApJ/939/96 if anymeta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar