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Distance to the Virgo Cluster Galaxy M100 from Hubble Space Telescope Observations of Cepheids

Distance to the Virgo Cluster Galaxy M100 from Hubble Space Telescope Observations of Cepheids

Freedman, W.L.; Madore, B.F.; Mould, J.R.; Hill, R.; Ferrarese, L.; Kennicutt, R. C. Jr.; Saha, A.; Stetson, P.B.; Graham, J.A.; Ford, H.; Hoessel, J.G.; Huchra, J.; Hughes, S.M.; Illingworth, G.D.
URI: http://hdl.handle.net/2014/33512
Date: 1994-10-27

Abstract:

Accurate distances to galaxies are critical to determining the present expansion rate of the Universe or Hubble Constant (H<sub>0</sub>). An important step in resolving the current uncertainty in H<sub>0</sub> is the measurement of the distance to the Virgo cluster of galaxies. New observations using the Hubble Space Telescope yield a distance of 17.1 ± 1.8 Mpc to the Virgo cluster galaxy M100. This distance leads to a value of H<sub>0</sub> = 17 km/sec/Mpc. A comparable value of H<sub>0</sub> is also derived from the Coma cluster using independent estimates of its distance ratio relative to the Virgo cluster.

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