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The Linearity of the Cosmic Expansion Field and the Value of the Hubble Constant

Published online by Cambridge University Press:  25 May 2016

G. A. Tammann*
Affiliation:
Astronomisches Institut der Universität Basel, Venusstr. 7, CH-4102 Binningen, Switzerland

Abstract

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A linearity test shows H 0 to decrease by 7% out to 18 000 km s–1. The value at 10 000 km s–1 is a good approximation to the mean value of H 0 over very large scales. The construction of the extragalactic distance scale is discussed. Field galaxies, cluster distances relative to Virgo, and blue supernovae of type Ia yield H 0 (cosmic) with increasing weight; they give consistently H 0 = 57 ± 7 (external error). This value is supported by purely physical distance determinations (SZ effect, gravitational lenses, MWB fluctuations). Arguments for H 0 > 70 are discussed and shown to be flawed.

Information

Type
I. Cosmological Parameters, H0, q0, Ω0 and Λ
Copyright
Copyright © Kluwer 1999 

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