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

Shoko Sakai, Jeremy Mould, Shaun M Hughes, John Huchra, Lucas Macri, R C Kennicutt, Bradley K Gibson, Laura Ferrarese, Wendy L Freedman, Mingsheng Han, Holland C Ford, John A Graham, Garth D Illingworth, Daniel D Kelson, Barry F Madore, Kim Sebo, Nancy A Silberman, Peter B Stetson

    Research output: Contribution to journalArticle

    Abstract

    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.
    Original languageEnglish
    Pages (from-to)698-722
    JournalThe Astrophysical Journal
    Volume529
    Publication statusPublished - 2000

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