arxiv: astro-ph/9809059 · v1 · submitted 1998-09-04 · 🌌 astro-ph

A Cepheid Distance to the Fornax Cluster

B. F. Madore , W. L. Freedman , N. Silbermann , P. Harding , J. Huchra , J. R. Mould , J. A. Graham , L. Ferrerase

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B. K. Gibson M. Han J. G. Hoessel S. M. Hughes G. D. Illingworth R. Phelps S. Sakai P. Stetson

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keywords distancecepheidfornaxgalaxyhubbleclusterconstantaccurate

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The Hubble Space Telescope is being used to measure accurate Cepheid distances to nearby galaxies with the ultimate aim of determining the Hubble constant, H_0. For the first time, it has become feasible to use Cepheid variables to derive a distance to a galaxy in the southern hemisphere cluster of Fornax. Based on the discovery of 37 Cepheids in the Fornax galaxy NGC 1365, a distance to this galaxy of 18.6 +/- 0.6 Mpc (statistical error only) is obtained. This distance leads to a value of H_0 = 70 +/- 7 (random) +/- 18 (systematic) km/sec/Mpc in good agreement with estimates of the Hubble constant further afield.

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A Cepheid Distance to the Fornax Cluster

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