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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 R. Mould
; Shaun M.G. Hughes
; John P. Huchra
; Lucas M. Macri
; Robert C. Kennicutt
; Brad 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. Silbermann
; Peter B. Stetson
; | | Date: |
15 Sep 1999 | | Subject: | astro-ph | | Abstract: | This paper presents the calibration of BVRIH$ Tully-Fisher relations based on Cepheid distances to 21 galaxies within 25 Mpc, and 23 clusters within 10,000 km/s. 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 which consisted of total I magnitudes and 50% linewidth data for ~550 galaxies in 16 clusters. For comparison, we also derive the values of H0 using surveys in B-band and V-band by Bothun and collaborators, and in H-band by Aaronson and collaborators. Careful comparisons with various other databases from literature suggest that the H-band data, whose magnitudes are 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) km/s/Mpc. We have also investigated how various systematic uncertainties affect the value of H0 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. | | Source: | arXiv, astro-ph/9909269 | | Services: | Forum | Review | PDF | Favorites | |
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