Implications of the red-shift-number test for cosmology

Details Implications of the red-shift-number test for cosmology Implications of the red-shift-number test for cosmology

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..57.2865l&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 57, Dec. 1, 1986, p. 2865-2867.

Mathematics

Logic

34

Cosmology, Hubble Constant, Red Shift, Astronomical Photometry, Astronomical Spectroscopy, Galaxies

Scientific paper

The cosmological implications of the measurement by Loh and Spillar (1986) of the number density of galaxies as a function of red shift and flux are investigated, extending the analysis to the case of nonzero cosmological constant (Lambda). The advantages of the red-shift/number test over classical red-shift/magnitude tests are discussed; the results of the test are presented in a graph; and the 95-percent and 67-percent confidence regions they imply are plotted in the lambda/Omega plane, where lambda is a nondimensionalized cosmological constant equal to Lambda/(3 x H0 squared) and Omega is the present mass-density/closure-density ratio. The data are found to support a big-bang cosmology and to imply that lambda = 0, that Omega = 1, and that the product of H0 and the age of the universe lies between 0.60 and 0.88.

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