The Hubble Constant from the HST Key Project on the Extragalactic Distance Scale

Details The Hubble Constant from the HST Key Project on the Extragalactic Distance Scale The Hubble Constant from the HST Key Project on the Extragalactic Distance Scale

1999-09-07

arxiv.org/abs/astro-ph/9909134v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of the Cosmic Flows Workshop, Victoria, Canada, July 1999, eds. S. Courteau, M. Strauss & J. Will

Scientific paper

The final efforts of the HST Key Project on the Extragalactic Distance Scale are presented. Four distance indicators, the Surface Brightness Fluctuation method, the Fundamental Plane for early-type galaxies, the Tully-Fisher relation and the Type Ia Supernovae, are calibrated using Cepheid distances to galaxies within 25 Mpc. The calibration is then applied to distant samples reaching cz~10000 km/s and (in the case of SNIa) beyond. By combining the constraints imposed on the Hubble constant by the four distance indicators, we obtain H0 = 71+/-6 km/s/Mpc.

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