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The Carnegie–Chicago Hubble Program. V. The Distances to NGC 1448 and NGC 1316 via the Tip of the Red Giant Branch

  • Authors: Dylan Hatt, Wendy L. Freedman, Barry F. Madore, In Sung Jang, Rachael L. Beaton, Taylor J. Hoyt, Myung Gyoon Lee, Andrew J. Monson, Jeffrey A. Rich, Victoria Scowcroft, and Mark Seibert

2018 The Astrophysical Journal 866 145.

  • Provider: AAS Journals

Caption: Figure 5.

Distance moduli and their uncertainties as part of this work compared with the existing literature (statistical and systematic errors are added in quadrature). The Cepheid distance (only available for NGC 1448) is published as “approximate” and is denoted here by an open circle (see Table 5 of Riess et al. 2016). SBFs, PNLFs, and the SN Ia of NGC 1316 are the only direct and reliable distance determinations to the galaxy (others report distances to the Fornax Cluster as a proxy). The SN Ia average is not an optimal comparative tool for our measurement given the calibration goals of the CCHP, but their average is presented here as a reference point (also denoted by an open circle) to compare against the large difference with SBFs. All measurements from the literature are taken at face value (nonadjusted for zero-points, extinction, etc.) and the displayed uncertainties are their respective errors on the mean. Vertical dotted lines pass through the results of this work.

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