Abstract
Counts of radio sources from a 2,700 MHz survey made with the Parkes telescope for regions away from the galactic plane have shown a slope for the log N–log S relationship of −1.4. This is in strong contrast to the slope of −1.8 usually found in counts of radio sources at lower frequencies. This low slope at 2,700 MHz throws considerable doubt on the often accepted hypothesis that the high slope for source counts at low frequencies is associated with an evolutionary decrease of the number density or of the level of emission of the radio sources or both.
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SHIMMINS, A., BOLTON, J. & WALL, J. Counts of Radio Sources at 2,700 MHz. Nature 217, 818–820 (1968). https://doi.org/10.1038/217818a0
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DOI: https://doi.org/10.1038/217818a0
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