Radio Sources: Angular Size from Scintillation Studies

The frequency spectrum of fluctuations caused by interplanetary scintillations may give a sensitive estimate of the diameter of a radio source. Observations of 3C 138, 3C 245, 3C 267, and 3C 273 give diameters of 0.1, ≤ 0.04, ≤ 0.2, and ≤ 0.02 second of arc, respectively. Resolution is at least a fa...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1966-08, Vol.153 (3737), p.745-746
Main Authors: Cohen, M. H., Gundermann, E. J., Hardebeck, H. E., Harris, D. E., Salpeter, E. E., Sharp, L. E.
Format: Article
Language:English
Subjects:
Carbon dioxide
Fractionation
Geophysics
Interferometers
Methane
Mountain ranges
Radio sources
Scintillation
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Summary:The frequency spectrum of fluctuations caused by interplanetary scintillations may give a sensitive estimate of the diameter of a radio source. Observations of 3C 138, 3C 245, 3C 267, and 3C 273 give diameters of 0.1, ≤ 0.04, ≤ 0.2, and ≤ 0.02 second of arc, respectively. Resolution is at least a factor of 5 higher than that obtained to date by means of either radio interferometers or lunar occulations.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.153.3737.745