Abstract
HEWISH, Readhead and Duffett-Smith1 have reported that interplanetary scintillation techniques reveal an absence of small-diameter sources at the largest redshifts. They have discussed the cosmological implications of the result using standard, homogeneous Friedmann models of the Universe. Here I point out the important effects on the angular diameter–redshift relation caused by small scale inhomogeneities.
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References
Hewish, A., Readhead, A. C. S., and Duffett-Smith, P. J., Nature, 252, 657 (1974).
Dyer, C. C., and Roeder, R. C., Astrophys. J. Lett., 174, L115 (1972); 180, L31 (1973); Astrophys. J., 189, 167 (1974).
Schücking, E. L., Z. Phys., 137, 595 (1954).
Kantowski, R., Astrophys. J., 155, 89 (1969).
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ROEDER, R. Significance of the angular diameter-redshift relation. Nature 255, 124–125 (1975). https://doi.org/10.1038/255124a0
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DOI: https://doi.org/10.1038/255124a0
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