The Tully-Fisher Relation and H_not

(2) ESO; (3) Wesleyan University; (4) Dartmouth College); G. Wegner (4) ((1) Cornell University; J. Salzer (3); L. da Costa (2); M. Haynes (1); R. Giovanelli (1); W. Freudling (2)

arxiv: astro-ph/9612072 · v1 · pith:5MHBNKSVnew · submitted 1996-12-06 · 🌌 astro-ph

The Tully-Fisher Relation and H_not

R. Giovanelli (1) , M. Haynes (1) , L. da Costa (2) , W. Freudling (2) , J. Salzer (3) , G. Wegner (4) ((1) Cornell University , (2) ESO , (3) Wesleyan University

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(4) Dartmouth College)

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keywords relationdistancesgalaxiestemplatetully-fisheraccurateadequateapplication

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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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The Tully-Fisher Relation and H_not

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