The Calibration of the Tully-Fisher Relations and the Value of H_0

Details The Calibration of the Tully-Fisher Relations and the Value of H_0 The Calibration of the Tully-Fisher Relations and the Value of H_0

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.3903s&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #39.03; Bulletin of the American Astronomical Society, Vol. 31, p.876

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the Tully-Fisher (TF) calibration effort of the Hubble Space Telescope Key Project on the Extragalactic Distance Scale. The BVRIH_{-0.5} TF relations are based on Cepheid distances to 19 galaxies and 30 clusters within 15,000 km s(-1) . These relations were then applied to distant cluster data in order to derive a value for the Hubble constant, H_0. We have also investigated how various systematic uncertainties affect the value of H_0 such as the internal extinction correction method used, Tully-Fisher slopes and shapes, a possible metallicity dependence of the Cepheid variable period-luminosity relation and cluster population incompleteness bias.

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