Abstract
Regrettably, the review of the redshift-distance relation in the review by Salpeter and Hoffman [Salpeter, E. E. & Hoffman, G. L., Jr. (1986) Proc. Natl. Acad. Sci. USA 83, 3056-3063], appears flawed. In particular, the logically inconclusive and uncertain hypothesis of local extragalactic spatial uniformity is used in an essential way. Moreover, even in conjunction with this hypothesis, the Lundmark law fits more closely than the Hubble law, on the basis of the data and criteria of Salpeter and Hoffman, when a rough approximation involved in the estimation of the galaxy luminosity function is eliminated. Specifically, the assumption that all galaxies in the redshift range 500-1700 km·s-1 are effectively at the redshift 1100 km·s-1 is made; when this assumption is replaced by a statistically optimal procedure that uses the precise redshifts, the relative fit of the two laws is reversed.
Keywords: cosmology, Hubble law, luminosity function, galaxies
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Nicoll J. F., Johnson D., Segal I. E., Segal W. Statistical invalidation of the Hubble law. Proc Natl Acad Sci U S A. 1980 Nov;77(11):6275–6279. doi: 10.1073/pnas.77.11.6275. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Salpeter E. E., Hoffman G. L. The galaxy luminosity function and the redshift-distance controversy (A Review). Proc Natl Acad Sci U S A. 1986 May;83(10):3056–3063. doi: 10.1073/pnas.83.10.3056. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Segal I. E. Directly observed relations in complete galaxy samples and the predictions of redshift-distance power laws. Proc Natl Acad Sci U S A. 1986 Oct;83(19):7129–7131. doi: 10.1073/pnas.83.19.7129. [DOI] [PMC free article] [PubMed] [Google Scholar]