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A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s−1 Mpc−1 Uncertainty from the Hubble Space Telescope and the SH0ES Team

  • Authors: Adam G. Riess, Wenlong Yuan, Lucas M. Macri, Dan Scolnic, Dillon Brout, Stefano Casertano, David O. Jones, Yukei Murakami, Gagandeep S. Anand, Louise Breuval, Thomas G. Brink, Alexei V. Filippenko, Samantha Hoffmann, Saurabh W. Jha, W. D'arcy Kenworthy, John Mackenty, Benjamin E. Stahl, WeiKang Zheng

Adam G. Riess et al 2022 The Astrophysical Journal Letters 934 .

  • Provider: AAS Journals

Caption: Figure 8.

Comparison of Cepheids measured in a dense (inner) field (in red) and sparse (outer) field (in blue) of NGC 4258. Because these Cepheids are at the same distance, the comparison shows the accuracy of the background estimates, which differ in the mean over the same sampled range, ﹩0.7\lt \mathrm{log}(P/\mathrm{day})\lt 1.2﹩, by 0.45 mag (relative to the Cepheids) yet yield a consistent intercept with σ ≈ 0.05 mag. The difference in metallicity between the samples, Δ[O/H] = 0.08 dex, corresponds to a difference of 0.02 mag, smaller than the precision of this comparison.

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