The Tully-Fisher Relation and H_not

Details The Tully-Fisher Relation and H_not The Tully-Fisher Relation and H_not

1996-12-06

arxiv.org/abs/astro-ph/9612072v1

Astrophys.J.477:L1-L4,1997

Astronomy and Astrophysics

Astrophysics

10 pages, including 2 figures and 1 table; uses AAS LaTex. Submitted to ApJ Letters

Scientific paper

10.1086/310521

The use of the Tully-Fisher (TF) relation for the determination of the Hubble Constant relies on the availability of an adequate template TF relation and of reliable primary distances. Here we use a TF template relation with the best available kinematical zero-point, obtained from a sample of 24 clusters of galaxies extending to cz ~ 9,000 km/s, and the most recent set of Cepheid distances for galaxies fit for TF use. The combination of these two ingredients yields H_not = 69+/-5 km/(s Mpc). The approach is significantly more accurate than the more common application with single cluster (e.g. Virgo, Coma) samples.

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