The Hubble space telescope key project on the extragalactic distance scale. XXIV. The calibration of tully-fisher relations and the value of the Hubble constant Academic Article uri icon


  • This paper presents the calibration of BVRIH-0.5 Tully-Fisher relations based on Cepheid distances to 21 galaxies within 25 Mpc and 23 clusters within 10,000 km s-1. These relations have been applied to several distant cluster surveys in order to derive a value for the Hubble constant, H0, mainly concentrating on an I-band all-sky survey by Giovanelli and collaborators, consisting of total I magnitudes and 50% line width data for 550 galaxies in 16 clusters. For comparison, we also derive the values of H0 using surveys in the B and V bands by Bothun and collaborators, and in H band by Aaronson and collaborators. Careful comparisons with various other databases from the literature suggest that the H-band data, which have isophotal magnitudes extrapolated from aperture magnitudes rather than total magnitudes, are subject to systematic uncertainties. Taking a weighted average of the estimates of Hubble constants from four surveys, we obtain H0 = 71 4 (random) 7 (systematic). We have also investigated how the value of H0 is affected by various systematic uncertainties, such as the internal extinction correction method used, Tully-Fisher slopes and shapes, a possible metallicity dependence of the Cepheid period-luminosity relation, and cluster population incompleteness bias.

published proceedings

  • Astrophysical Journal

author list (cited authors)

  • Sakai, S., Mould, J. R., Hughes, S., Huchra, J. P., Macri, L. M., Kennicutt, R. C., ... Stetson, P. B.

complete list of authors

  • Sakai, S||Mould, JR||Hughes, SMG||Huchra, JP||Macri, LM||Kennicutt, RC||Gibson, BK||Ferrarese, L||Freedman, WL||Han, M||Ford, HC||Graham, JA||Illingworth, GD||Kelson, DD||Madore, BF||Sebo, K||Silbermann, NA||Stetson, PB

publication date

  • February 2000