Summary
Forty-four strong radio sources optically identified with, peculiar galaxies were used in a plot of the radio magnitudes with the logarithm of the red-shifts. A (m r, logcδ) plot was established also for weak radio sources in 9 groups and clusters. These plots were compared with the photographic magnitude red-shift relation analysis of 15 groups and clusters with logcδ smaller than 3.74. The coefficients of the three straight lines obtained were not essentially different from the 2.5 value predicted for an Einstein-de Sitter static universe. These results are not inconsistent with that obtained by Hawkins in 1962 for the (m p, logcδ) relation of field galaxies brighter than 14 mag.
Riassunto
Si sono impiagate quarantaquattro radiosorgenti identificate otticamente con galassie particolari in un diagramma delle radiograndezze rispetto al logaritmo dello spostamento verso il rosso. Si è costruito anche un diagramma (m r, logcδ) per deboli radiosorgenti in 9 gruppi ed ammassi. Questi diagrammi sono stati confrontati con l’analisi della relazione fra la grandezza fotografica e lo spostamento verso il rosso di 15 gruppi ed ammassi con logcδ minore di 3.74. I coefficient delle tre rette ottenute non sono sostanzialmente differenti dal valore 2.5 predetto per un universo statico di Einstein-de Sitter. Questi risultati non sono discordanti da quello ottenuto da Hawkins nel 1962 per la relazione (m p, logcδ) di galassie di campo più luminose delle 14 grand.
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Gomide, F.M. Static cosmological model and red-shift for radio galaxies. Nuovo Cimento B (1965-1970) 41, 156–163 (1966). https://doi.org/10.1007/BF02710381
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DOI: https://doi.org/10.1007/BF02710381