The Tully-Fisher Relation and H_not
  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. 
R. Giovanelli (1), M. Haynes (1), L. da Costa (2), W. Freudling (2),   J. Salzer (3) and G. Wegner (4) ((1) Cornell Universi...