Journal article

Final results from the Hubble Space Telescope key project to measure the Hubble constant

WL Freedman, BF Madore, BK Gibson, L Ferrarese, DD Kelson, S Sakai, JR Mould, RC Kennicutt, HC Ford, JA Graham, JP Huchra, SMG Hughes, GD Illingworth, LM Macri, PB Stetson



We present here the final results of the Hubble Space Telescope (HST) Key Project to measure the Hubble constant. We summarize our method, the results, and the uncertainties, tabulate our revised distances, and give the implications of these results for cosmology. Our results are based on a Cepheid calibration of several secondary distance methods applied over the range of about 60-400 Mpc. The analysis presented here benefits from a number of recent improvements and refinements, including (1) a larger LMC Cepheid sample to define the fiducial period-luminosity (PL) relations, (2) a more recent HST Wide Field and Planetary Camera 2 (WFPC2) photometric calibration, (3) a correction for Cephei..

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University of Melbourne Researchers