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astro-ph1998
Variations of the Cosmic Expansion Field and the Value of the Hubble Constant
G. A. Tammann
Four Hubble diagrams are combined to test for the linearity of the cosmic expansion field. The expansion rate, H_0, is found to decrease by ~5% out to 18000km/s. Beyond this distan…
astro-ph1998
The Linearity of the Cosmic Expansion Field and the Value of the Hubble Constant
G. A. Tammann
A linearity test shows H_0 to decrease by 7% out to 18000 km/s. The value at 10000 km/s is a good approximation to the mean value of Ho over very large scales. The construction of…