Abstract
THE relationship between spectral index and luminosity for the 3CR extragalactic sources suggests1–3 that sources with high radio luminosity have, on the average, steeper spectra than do the low luminosity sources. But as Kellermann et al.3 point out, the scatter in the relationship is quite large. In addition, they found that the correlation exists only for radio galaxies and not for quasars.
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References
Heeschen, D. S., Pub. Astron. Soc. Pacific, 72, 368 (1960).
Conway, R. G., Kellermann, K. I., and Long, R. J., Mon. Not. Roy. Astron. Soc., 125, 261 (1963).
Kellermann, K. I., Pauliny-Toth, I. I. K., and Williams, P. J. S., Astrophys. J., 157, 1 (1969).
Lynden-Bell, D., Mon. Not. Roy. Astron. Soc., 155, 119 (1971).
Bolton, J. G., Astron. J., 74, 131 (1969).
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MACLEOD, J., DOHERTY, L. The Luminosity–Spectral Index Relationship for Radio Galaxies. Nature 238, 88–89 (1972). https://doi.org/10.1038/238088a0
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DOI: https://doi.org/10.1038/238088a0
