The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch

@article{Freedman2019TheCH,
  title={The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch},
  author={W. Freedman and B. Madore and D. Hatt and Taylor J. Hoyt and In-Sung Jang and R. Beaton and C. Burns and M. Lee and A. Monson and J. Neeley and M. Phillips and J. Rich and M. Seibert},
  journal={The Astrophysical Journal},
  year={2019},
  volume={882},
  pages={34}
}
  • W. Freedman, B. Madore, +10 authors M. Seibert
  • Published 2019
  • Physics
  • The Astrophysical Journal
  • We present a new and independent determination of the local value of the Hubble constant based on a calibration of the Tip of the Red Giant Branch (TRGB) applied to Type Ia supernovae (SNeIa). We find a value of Ho = 69.8 +/- 0.8 (+/-1.1\% stat) +/- 1.7 (+/-2.4\% sys) km/sec/Mpc. The TRGB method is both precise and accurate, and is parallel to, but independent of the Cepheid distance scale. Our value sits midway in the range defined by the current Hubble tension. It agrees at the 1.2-sigma… CONTINUE READING
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