J/ApJ/929/116ivo://CDS.VizieR/J/ApJ/929/116doi:10.26093/cds/vizier.19290116CDSOakes E.K.Hoyt T.J.Freedman W.L.Madore B.F.Tran Q.H.Cerny W.,Beaton R.L.Seibert M.2024-11-06T20:24:42Z2024-04-11T11:39:05ZCDS support team

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

cds-question@unistra.frdwarf-galaxiespopulation-ii-starsinfrared-photometryvisible-astronomyphotometrylocal-groupWe determine three independent Population II distance moduli to the Fornax dwarf spheroidal (dSph) galaxy, using wide-field, ground-based VI imaging acquired with the Magellan-Baade telescope at Las Campanas Observatory. After subtracting foreground stars using Gaia EDR3 proper motions, we measure an I-band tip of the red giant branch (TRGB) magnitude of I_0_^TRGB^=16.753+/-0.03_stat_+/-0.037_sys_mag, with a calibration based in the LMC giving a distance modulus of {mu}_0_^TRGB^=20.80+/-0.037_stat_+/-0.057_sys_mag. We determine an RR Lyrae (RRL) distance from template mean magnitudes, with periods adopted from the literature. Adopting a Gaia DR2 calibration of first overtone RRL period-luminosity and period-Wesenheit relations, we find {mu}_0_^PLZ^=20.74+/-0.01_stat_+/-0.12_sys_mag and {mu}_0_^PWZ^=20.68+/-0.02_stat_+/-0.07_sys_mag. Finally, we determine a distance from Fornax's horizontal branch (HB) and two galactic globular cluster calibrators, giving {mu}_0_^HB^=20.83+/-0.03_stat_+/-0.09_sys_mag. These distances are each derived from homogeneous IMACS photometry, are anchored to independent geometric zero-points, and utilize different classes of stars. We therefore average over independent uncertainties and report the combined distance modulus <{mu}_0_>=20.770+/-0.042_stat_+/-0.024_sys_mag (corresponding to a distance of 143+/-3kpc).2022ApJ...929..116Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/929/116CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)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)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AJ/115/193 : RR Lyrae V light curves (Layden, 1998)J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)J/AJ/118/1671 : Fornax cluster 4 VI photometry (Buonanno+, 1999)J/AJ/123/840 : VI photometry of variable stars in Fornax (Bersier+, 2002)J/MNRAS/345/747 : RR Lyrae in 4 Fornax globular clusters (Mackey+, 2003)J/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004)J/AJ/127/840 : VRI photometry of Fornax red giants (Pont+, 2004)J/A+A/459/423 : VI and [Fe/H] of Fornax dSph RGB stars (Battaglia+, 2006)J/A+A/467/1025 : JHK phot. of Fornax red giant branch (Gullieuszik+, 2007)J/MNRAS/389/1924 : Old stellar syst. (globulars to ellipticals) (Forbes+, 2008)J/ApJ/685/947 : SX Phe stars in Fornax. II. (Poretti+, 2008)J/MNRAS/384/1583 : JHK light curves of RR Lyr (Sollima+, 2008)J/ApJ/701/1323 : Variable stars in Fornax dSph. III. (Greco+, 2009)J/MNRAS/394/795 : AGB stars in Fornax dwarf spheroidal gal. (Whitelock+, 2009)J/A+A/544/A73 : BVI photometry of Fornax dSph galaxy (de Boer+, 2012)J/A+A/544/A155 : HST photometry of M31 globular clusters (Federici+, 2012)J/A+A/572/A82 : Abundances in outer parts of Fornax dSph (Hendricks+, 2014)J/ApJ/789/147 : Star formation histories of LG dwarf galaxies (Weisz+, 2014)J/MNRAS/453/2653 : Carbon stars in the Galaxy and its satellites (Huxor+, 2015)J/A+A/585/A86 : Fornax dSph H4 globular cluster stars (Hendricks+, 2016)J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)J/ApJ/845/146 : Carnegie-Chicago Hubble Program. II. IC 1613 (Hatt+, 2017)J/AJ/154/263 : NIR photometry of 77 RR Lyrae stars (Karczmarek+, 2017)J/AJ/153/96 : Standard Gal. field RR Lyrae. I. Photometry (Monson+, 2017)J/ApJ/869/82 : Carnegie-Chicago Hubble Program: RRL NIR obs. (Rich+, 2018)J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)J/MNRAS/485/3042 : UBVRI photometry in 48 globular clusters (Stetson+, 2019)J/AJ/158/16 : RR Lyrae stars from the DES (Stringer+, 2019)J/ApJ/906/125 : Carnegie-Chicago Hubble Program IX. TRGB (Jang+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/929/116https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/929/116http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/929/116https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/929/116https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/929/116http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/929/116GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/929/116/table3 (IMACS photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/929/116/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/929/116/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/929/116/table3?GETtext/xml+votable180.050000true39.7673182-34.72531710.0055555555555555566/35883 35968-35969 359712.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/929/116?format=asciiOpticalInfrareddefaultJ/ApJ/929/116/table3IMACS photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[39.5/40.5] Right Ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-35/-34] Declination (J2000)degpos.eq.dec;meta.mainindexedVmag[16/26.3]? Averaged apparent V band Vega magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.01/0.6]? Uncertainty in Vmag (1)magstat.error;phot.magfloatnullableImag[15/25.6]? Averaged apparent I band Vega magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag[0.01/0.6]? Uncertainty in Imag (1)magstat.error;phot.magfloatnullableCut[0/1] Gaia EDR3 cut flag (2)meta.codeint