The brightness temperature of Venus and the absolute flux-density scale at 608 MHz
We measured the disk temperature of Venus at 608 MHz near the inferior conjunction of 1972 and obtained a value of 498 deg plus or minus 33 deg K using a nominal CKL flux-density scale. The result is consistent with earlier measurements, but has a much smaller uncertainty. Our theoretical model prediction is larger by a factor of 1.21 plus or minus 0.09. This discrepancy has been noticed previously for frequencies below 1400 MHz, but was generally disregarded bccause of the large observational uncertainties. We have found no way to change the model to produce ageement without causing a conflict with well- established properties of Venus. Thus we are led to suggest that the flux- density scale may require an upward revision, at least near this frequency, in excess of what has previously been considered likely. (auth)
- Research Organization:
- Owens Valley Radio Observatory, California Institute of Technology
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-022094
- OSTI ID:
- 4316533
- Journal Information:
- Astrophys. J., v. 183, no. 3, pp. 1081-1085, Journal Name: Astrophys. J., v. 183, no. 3, pp. 1081-1085; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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