H0 measurement from VLT deep I-band surface brightness fluctuations in NGC 564 and NGC 7619

S. Mei, M. Scodeggio, D.R. Silva, Peter Quinn

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    Abstract

    We have measured the Hubble constant H0 in NGC 564 at km s -1 and in NGC 7619 at km s -1 with deep I-band Surface Brightness Fluctuation distance measurements at the ESO Very Large Telescope (VLT). We obtain km s -1/Mpc for NGC 564 and for NGC 7619. The actual SBF sample used for the measurement of H0 in the Hubble Space Telescope Key Project on the Extragalactic Distance Scale (Freedman et al. 2001) amounts to six galaxies. When we combine the measurements from this work with our previous VLT I-band SBF distance measurement in IC 4296 (Mei et al. 2000), we obtain: H0 = 68 5 6 km s -1/Mpc. When we add the Freedman et al. (2001) SBF sample, we obtain km s -1/Mpc.
    Original languageEnglish
    Pages (from-to)441-448
    JournalAstronomy and Astrophysics
    Volume399
    Issue number2
    Publication statusPublished - 2003

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